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.

There is nothing we can do, except talk with the mods....

For those who doesn't know  how to do it:
How to use IRC (from what I gathered from a thread on /g/):

1. Google xchat-wdk for a decent IRC client.
2. Register nick for yourself. You'll need a valid email address.
3. Login to the Rizon server.
4. Join #4chan channel. (/join #4chan)
5. Wait for a mod. Mods are nicks with @ and % next to their names. Some mods also have a + next to their names as well, but not all. Tell the mod you have the error.
6. Give the mod your IP address, and they should "un-ban" you.

Google how to use IRC commands if not sure, etc.

>>IRC commands:

/join #4chan

-to stop disconnections from time to time you want to send a status packet by joining the root room or 0 room by typing:

/join #0,0