There is a really easy solution to this problem. It is called captchas. Basically the server generates a picture, and send it to the client. The user must look at the picture, and type in the contents into a text entry field. The picture is blurred or distorted in some way that prevents a computer from doing optical character recognition on that picture. *hint* you had to respond to a captcha when you registered for this forum. I would propose that captcha's be made more common for certain types of characters(level 3 collecting yews, etc), then for others, because they are a pain in the [wagon] to fill out.