After the incident on moonchan, some people defended vichan's anti-spam method of using random hidden inputs. So I wrote a proof of concept automated method of picking up these inputs for posting.
http://paste.debian.net/1128272/
This is script is not for spam, it makes a single post on a thread and it even requires a file. If you send none, vichan thinks it was automated. So there's some room for improvement over there.