Well we had our first successful spambot registration AND posting. So I found a mod that has very high marks for stopping said spambots from being able to register, and is otherwise invisible to anyone else (it's not a new layer of "prove your a human" or anything like that).
I would like to install the visual recognition and get rid of Captcha, but I need to take some pictures first. It shows your picture group and the question would be (for example) "Check all of the images that are of a car." And there'd be some car pictures, and one of a dog, or a tree, etc.
You use your own pictures, so that the bots can't use online image comparison/tag tools to try to script it.
But let's see how this goes. Some guys said they were able to shut off captcha and use *just* this mod, which would be nice.