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.

Oh my god I just got blocked again!?

Etisalat egyptfag this is fucking stupid. I'm gonna try resetting my IP in case it fucking does something otherwise I am giving invisbro a stern and firm email.