Thread
Just out of curiosity...
Well as you just said, its a dynamic IP, hence any man and his dog who uses your ISP could've had that IP. I ask...is it really that much of an issue as to why that address got banned? I certainly don't know, but in any case, getting a new IP address is simply a case of reconnecting, as you've realised.
It's not related, see here:Not sure if it's a related issue or not, but for the last two days I have been getting a "can not connect - user has exceeded bandwidth, try again later" message (not those exact words) and couldn't get connected even after several attempts.
viewtopic.php?f=1&t=10122
As for the original problem, since it's a shared IP address it was probably used to spam the forums at some point. I've removed it from the banned list, so you shouldn't have more problems with it...