>>5
How it works: Well, he set up a simple scanner that looks for specific flags inside of the image files uploaded onto 4chan. If the image/virus file contains unencrypted, plain text codes such as those used in the 4chan.js script, it will deny the post and autoban you for 7 days.
How I found out: I tried posting the 4chan.gif picture without the words that are usually posted with it (open file, shit brix, etc.), assuming that the ban was based on a wordfilter, and it came up with the deny saying that it detected 'possible malicious code in the image' and banned me.
How to bypass: Obfuscate code that you append to the image you want to post, that way the shitstorm works and lasts for a bit before mods make wordfilter bans of your 'instructions.'
Some of the older code and strains: Written in Javascript and copied to this site:
http://www.encyclopediadramatica.com/4chan.js
I think that covered everything. Also, I don't know any programming languages myself, trying to teach myself regular Java, but have always been fascinated with viral programs.