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.

>>65
The site can detect posts made using proxies (unless you're using an elite one, that could give them a hard time). It's not impossible, though.

And I can't, motherfucking /v/ is going crazy over lotsa releases