Why has my IP been banned?

I tried to log in this morning and got the message that my IP had been banned??? My user account is obviously still active so whats the deal? I haven't even posted in the last couple of days so I'm at a loss for what happen if any 1 can provide so insight I would appreciate it.

Newbie overclocker got banned today and he has like 50 IP addresses, so i was forced to ban the IP blocks. I am sorry if it leaves some of you unable to connect, and i am looking into the matter, and will talk to the ISP.

Thanks cat, in the mean time I'll swap nics to attain a new mac address (that should give me a new IP, hopefully not also part of the banned block).

A little confused???

I switched the nic and cable modem with my folks system (their system could still access SF with their IP 24.68.37.xx) and thus took their IP. Now it doesn't work (24.68.33.xx) but my old IP (24.68.34.xxx)now works on their system??

It's almost as if my "system" was banned, not the IP???