I got some errors at install (steps 1,2,4) and have a question:
Can i use your mod for postvaliadtion for guests also?

Larian

ok, i found that not all the bots where getting the info that way, so then i  went and was looking at the image creation code...

I found that that is how the bots where doing it. They where physically reading the image, so i began editing it. Here is what i came up with... it is crude, but it works:

http://www.tkforums.com/?action=register

I am not going to release the source for this until i add a few more things like random lines though it.

This actually creates random dotts that are a random color (of the available colors) in random spots on the image. This one is at about 2 random dotts per block (by default a block is 3x3, so about a ~22% chance of it being a random color). It also alternates between 2  base color blocks of each type so 4 different base blocks total randomly.

So in theory the bot would have alot of trouble because of the randomness, but that does not garantee a spam free board. But so with having it up for 1 week now i have not had 1 bot spam (before i was having about 1-2 botts spam per day).