ISP blocked due to abuse?

Well, it seems today that I'm now unable to post anything over at the 4chan imageboards, otherwise I get this message:
"Posting from your ISP has been blocked due to abuse. [More Info]"
I can still browse the site, all the images and threads load fine, I just can't post. What gives? I've never posted spam or porn.

>>54
The thing is, do they care about this particular breed of posters? I've never heard of sand niggers protesting shit before on 4chan.

Man I'll really be amused if it turns out someone is responsible (anontalk style).