]If I'm not mistaken, signature bans were always rare and were implemented as a way to be merciful to members who committed a serious infraction of the rules but who might not necessarily deserve a permaban--like with those members who've contributed significantly to the forum. I could be wrong about that, but I've only seen them handed out very occasionally.
a sig ban is punishment?
sure for those in campaigns maybe but (for example) i could get a sig ban and not even notice. i also have sigs turned off forum wide anyway.
so basically, sig bans as punishment only works on a particular subset of posters.