If there's something in there that's likely to be someone's kink or squick, I'll tag for that. People who don't like it can avoid it, people who are looking for it can find it, everybody wins.

I was kind of weirded out when I first discovered that Supernatural fandom was so insistent on labeling who's on the top, but I've since come to appreciate its role in minimizing my chances of coming across dewy-eyed uke!Sam.