It's like a bunch of little kids with horrendously big hideous, broswer killing, flash signatures four times as big as their posts everywhere. Basically the same reason myspace died and was replaced by a site for adults-Facebook. Seriously it's basically unreadable. The posting software is also terrible, full of bugs etc.
One you get into qouting, you have somebody writing one line of new content amidst 10 inches of gaudy flash and qouted posts.
If ioi wants to get serious about this sites forum, this forum software needs scrapping. Or at the very least some bug fixes and mainly, sigs turned off or toned down