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.

>>934
Yea.

Gonna try my luck with IRC. They *know* about ISP Bans, and basically amounted to saying "Thems the break, kid. You can't circumvent the ban without breaking a few rules". But HOPEFULLY, somehow, we can just get rid of ISP bans entirely.