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.

>>68
Yup, that was me (alexandriafag). Just finished talking with them at #4chan, they were very nice people.

But spam IS coming our way so it's not guaranteed to stay up for long. Have fun.