We (#perl) banned mib_* nicks and found anybody smart enough to type their own nickname in was generally fine. Plus we learned how to extract the original IP from the mibbit host string so we could nuke ban evaders comfortably even without freenode supporting WEBIRC.
In fact, we were planning to have mibbit links to freenode#perl showing up all sorts of places in the perl community to try and make it easier for people to get onto IRC and ask questions when they got stuck with things. I've notified the guys working on that to hang fire until we work out what the hell is going on.
Most annoying, whoever's fault it is (and being an argument on the internet I'm going to default to "everybody's, and especially mine, even if I wasn't involved" :)
In fact, we were planning to have mibbit links to freenode#perl showing up all sorts of places in the perl community to try and make it easier for people to get onto IRC and ask questions when they got stuck with things. I've notified the guys working on that to hang fire until we work out what the hell is going on.
Most annoying, whoever's fault it is (and being an argument on the internet I'm going to default to "everybody's, and especially mine, even if I wasn't involved" :)