Horror stories float around all the time about this or that guy that found his IP on the black list of one of the many company that mantains this kind of service. But how stupid can be to ban entire IP blocks "by automated default" with some automathic triggers, when you risk to lock out dozens of people? Often getting an IP out of a black list need days if not weeks!!
I have just tried to fire up the IRC client to have some talk on the #donationcoder channel, and the server on the other side notify me that my IP is blacklisted an so i'm d-lined. What stupid can this be? I'm on a DSL with dynamic IP (like some thousands other people around here), so this kind of thing can block me now, another guy an hour from now, etc. etc.