It's really obnoxious when people keep forcing their own thread to the top. I'm not sure a player should be able to "bump" their own thread repeatedly. If no one's replying, it's for a reason - they aren't interested.
See http://www.glitch.com/forum/general/11964/ as an example. Guy keeps bumping his spammy selling stuff thread, instead of using auction or Global or some other channel.
It makes the forums harder to navigate and a lot less interesting overall.