So honest question as I haven't seen it brought up in the thread yet: what about the players that do make their characters look like themselves?
Obviously most folks aren't going to have the exact body proportions, but there are players out there that make a point of getting their character to look as close to how they look offline as possible. The character's still not technically them, but any unwanted "nudes" being posted would hit closer to home in those cases. Is that still a case of "just deal with it," or is that walking along more dangerous territory? Are you really going to tell them that they shouldn't design their character how they want, just like a lot of folks have already said "well don't wear x glamour then"?
You can say "it stays on the client side" all you want, however when completely unwilling participants are being told to dress/design their own avatar a certain way to "deal with it or avoid it," then suddenly it does affect them. No one should be forced to avoid certain glamours of all things just because someone else wants to view everyone and their mother naked. No one should be forced to look up an NSFW mod they're not interested in just to figure out what should be avoided in game for it. Not to mention it would just become an eternal chase, because we all know good and well more and more glamours would get added over time to work around that.
I don't think the modding community as a whole should be targeted or condemned (heavens no!). However I don't think OP's concern should be apathetically swept to the side either. There's just too many ways it could go wrong, which is why MMOs these days typically put methods in place to try to prevent mods. I don't like playing the "but the children!" card, but one example is that a lot of minors play this game (like 5-12 year olds). Can you imagine they or their parents' reactions if a nude of their character was discovered online? It's not the kid itself but it would absolutely do something negative. And are you really going to tell a parent "well you should have looked up this mod and made sure your kid didn't wear x glamour!"?