I've commented about this before deep in another thread. Here's my opinion in TL;DR version:

Shitty and anal tags can be a problem. I've seen plenty of times when they're just indicative of someone self-righteous and oh-so-superior feeling like it's appropriate to voice something mocking/insulting. And as far as I'm concerned it is never good for unproductive dickery to be acceptable, no matter how little harm it does in that instance, because it's accepting a mentality that causes issues both in the real world and on the internet.

However, the degree to which anal tags are a problem varies with the usefulness of the post. There's plenty of times when these tags are mocking and self-supperior, but the OP/thread is really deserving of it, and/or the thread contains nothing useful. In practice, I realize that the above ideal of countering needless dickery doesn't actually gain much of anything by forcing significant tag moderation. The underlying problems (people being dicks when it's not a poignant way to express something, but just for the sake of it or for their amusement; the growing ratio of snide and hostile members to truly helpful ones), still remain.

I would be in favor of non-anonimization of the tags - you still have your nickname to keep you truly anonymous, and your IPs aren't publicly visible anyway. And if that's not enough there's Tor and being able to route your traffic through remote servers, etc. If someone has the skill to find you past that point, you're probably dealing with someone who's not interested in what you tagged a thread with.

But ultimately, I think it's really only an actual problem when threads with useful information get tagged with only uselessness indicating tags. And contrary to what Texrat's comment suggests, that does happen often. Not enough people add useful tags.

But I don't view it as enough of an issue to require admin attention. There's plenty of forum members who can edit the tags themselves (You get that ability after some post amount). Indeed, I've seen it in action on some threads, which I'm guessing wasn't all moderators/admins.