This "make the most pages" thread. It's not so much the actual thread that's annoying me, but it means that late at night, when the forum's quite empty, instead of having a few strange and usually funny topics popping up, there's just an inane stream of babble in that one thread. Nobody's sitting about thinking of something to post about, they just lob some nonsensical buggery into that.
I despise posting for the sake of posting