I mentioned in another thread that, as of vB 3.5, the registration process involves a "captcha":
The system creates an image of several letters or numbers that a real human has to read and re-enter, to prove they are not automation.
The down side of this is that no blind people can register for the Cellar. Their programs can't read the captcha.
I realize that this thread was not created to ask the question, but I thought it was interesting anyway.