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.

>>983
keep dreaming faggot, not gonna happen, for now we should try to use >972 until someone contacts that faggot moot... I've tried everything man fuck why did i even start visiting this shitty website in the first place? i was a cool guy now im a loser faggot who sends gore to his ex-teachers hoping he could see them in the newspaper, being dead because of a heart attack
but now i don't have even this? shite