If you hate someone that's fine, if you feel no other optino but to. However the idea of starting a thread about it suggests that one would be wanting to get some sort of 'campaign of hate' going against said poster. That is immature and totally unnecessary.
Hate is a weird and strong term, because it's very rarely rational. 'Hate Thread', that's just asking for trouble imo.
I'm starting to rant now so I'll stop. <img src="smile.gif" border="0">