Oh yeh... I forgot about moderators... most of those other sites have someone sitting there and cleaning up the porn etc that spammers post to forums!
Since Vorb (the nz equivilent of this) went through an upgrade at the start of the year there seems to be a bit more spam turning up on the boards...
The upgrade over there did not run as smoothly as it possibly could have either... but all the regulars are still there.