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.

I am betting most of the spam bots are from Egypt. Because we have a majority of ignorant fucks. But I am clean though, running common sense 2010.

Unban pls. I want to troll /g/ with more fermi threads.