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.

>>86
>>84
WTF IS UP WITH ALL THESE INDIANS? 

"HOW." IS LIFE ON THE RESERVATION TREATING YOU?  WANT SOME FIRE-WATER?

Thanks for listening
--CHIEF KNEADING-TITS(´・ω・)つ(・(・