those who were seen dancing

I believe there are three paths to LJ notoriety sufficient to attract idiots. The first is 'be jwz'. Moving on from that, we have two choices: comics (I bet iharthdarth gets dumb comments, although probably most just read "lol dude LOL"), and Harry Potter fanfiction. Especially a HP journal in which you occasionally write m/m porn but spend significantly more time flaming other writers. And ask for money from your readers a lot. Of course, that's getting into the realm of having a stupid LJ, but if that's the price for stupid comments, maybe it's a price you need to consider.