With age comes wisdom? ;)
Nah, it's just that the dead wood is culled out.
As one poster put it on the "opus" thread last night, some people get a vastly overblown view of their own importance around here. And when it is pointed out to them that their views hold no greater weight than others who haven't been around as long, they have a snit, take their ball and go home.
I can honestly say I've never missed one of the banned posters (other than to laugh at them).