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.

>>846

well, well, well, what have we here another faggot neckbeard (most likely yuro) shitting up the place with his /b/ faggotry. you picked the wrong night to fuck around, asshole. i've just texted the a mod (we're friends irl) about this thread, so he'll be here shortly to deal with the matter, and most likely hand out some sorely needed bans. i'm also going to report and sage the thread (for safe measure), as well as alert the other moderators in the 4chan irc channel. and just in case you wanna try and pull a fast one, i'm screen shotting the entire thread for additional proof and e-mailing moot about the matter personally.