I cannot recall the numbers; but I recently heard a news blurb about the increase in tattoos over just the last decade and the numbers were impressively high.
I personally don't have tattoos and for the most part I don't care if others have them. It's their body, not mine. There are some tattoos I'd rather not see; but that speaks to the poor taste of the wearer so, again, don't care.

When I was at Orvis Hot Springs in Colorado years ago, there was a young lady there with a back tattoo and it was the only one on her body.  She was strikingly beautiful, and the tat was of a swirly, symmetrical design that started at the bottom of her spine, widening as it went up until it stopped at her shoulders. It was absolutely beautiful and if they hadn't a hard and fast rule against cameras on property, I would have asked her if I could take a picture of just her back.  When tattoos are done like that, for art's sake, they can be very attractive.

We both have tattoos and body piercings including genital piercings. We have found in this area that tattoos are acceptable for anyone. Piercing are a bit different. Women with piercings of any kind are accepted but men are looked at differently. Men with piercings are usually automatically considered to be homosexuals. While trying to find a nudist venue we can go to... almost all we have looked at do not allow genital piercings and many frown on body piercings. Of course for us this makes it very difficult to find anywhere to go as the closest location to us is 8 hour drive away. We have been told one of the reasons it is frowned upon is because they promote sexual things. We disagree with that, like seeing anything new it will have some curiosity about it. But our children have grown up with their parents having and getting tattoos and piercings and to them it is no different than getting your ears pierced or even wearing a new hat.

Neither Rin nor myself have Tattoos or peircings, but we have many friends that do. Personally I (Robin) have no issue with it if that is what people want, and I must admit, over the years i have seen some really beautiful art on peoples skin, which is how i tend to look at it, as skin art. I love great art, I am a frustrated artist and cannot draw for my life, although it does not stop me trying, but I can appreciate it, even if it is on someones skin.
The times are changing, and the Tattoo especially is now something that is main stream and I feel will eventually have to be accepted by some of those places that exclude Tattoos.
The way I see it, naturisum is supposed to be inclusive of all who want to shed their clothing, and I feel that a tattoo should not be a reason to exclude others, and the same should be said for body piercings. I think the most important element of Naturisum should be body positivity, and if these extra adornments help a person feel positive about how they look or who they are, we should all be understanding of that and embrace them.
Trends come and trends go, but I feel that Tattoos esecially are here to stay, and we should as we do with each other, simply accept that. 
We both find it interesting that Body Painting has grown so quickly amongst naturists, which to be honest is art on the skin, and yet we have encountered a few clubs that will happily accept body painting, yet refuse tattoos, it feels a tad unfair.

When we were researching clubs and venues for the inspiration area of ANW, a lot of clubs seemed to limit their refusal of tattoos to just those that are seen as aggressive, racist or similarly distasteful but are OK with tattoos in general. I wonder how these clubs measure such things - like film certificates?

Certainly a lot more clubs still refused members to have genital and breast piercings. I think a lot of clubs argued that it was bringing unnecessary attention to those parts of the body. Parts of the body that naturism argues are no more in need of attention than the elbow or the shin. The argument that we wear jewellery to attract attention to enhance our ears, necks and hands - why as naturists would we wish to attract attention to our genitals or make them look more attractive? I can see what they mean, but the other side of that is that if you had an elbow or a shin pierced would that be seen as a problem?

There are also many sites (naturist and otherwise) that claim that some body piercings and jewellery are sexually enhancing and pleasurable and if that is true then it would seem a little bizarre that clubs would ignore them, just as they would not allow Members to carry sex toys or stimulate themselves with their hands. The problem is how can anyone measure this? MaineNudeFamily make the point very well that they disagree with the idea that they are sexual, and surely only the individual wearer can truly be the judge of that. 

Where do clubs find the lines between appropriate and inappropriate tattoos and piercings, can they even try to? I guess that is why many in the past just said no. Today tattoos and piercings are so common a club with a complete no attitude is going to seem detached from reality. Though some things that people do to their body are still quite shocking and are maybe meant to disturb. I saw an image once of a man who had had his penis sliced down the middle lengthwise had a stud in each end that were attached by chain to rings in his nipples that then pulled the two halves of his penis into a v-shape against his tummy. Clubs must feel they are damned if they do and damned if they don't and there is no easy middle ground. 

I think naturists are pretty accepting on the whole and most like the idea of an "each to their own attitude." Clubs are going to wish to encourage this attitude but also know that there are certain things that people will find offensive and I do not envy these clubs finding the best answer. 

Everything is grey, nothing is black and white. I like the idea that naturism helps people feel good about their natural bodies. That it helps us feel comfortable about the people we were born to be. The need to dress ourselves, decorate ourselves and alter ourselves should be seen as unnecessary to find confidence and comfort with our bodies. But there is not one of us that has not done something to alter ourselves. It may not be plastic surgery or a torso of tattoos, but we all will have done one of many other things - had our hair dyed, worn make-up, shaved, had our teeth straightened ... We are all enhanced in one way or another.

The issue of tattoos will be around for awhile. Personally I think the trend toward tattoos will peak in a few years.
 I don't have a problem with tattoos or piercings in general. However, when either one is drawing attention to the genital area of the body how is that any different than the argument that some make about swimwear drawing attention to those same areas? 
 Also, sometimes the content of the tattoos can be questionable. Personally, I think if it's something you wouldn't want your kids to see then it's a problem.
If anything, the whole issue can be very subjective.