[Phil Van Sexton]

I agree that this is a good thing, but how about preventing bots rather than trying to detect them?

Sign up for hotmail or yahoo and they will make you type in a word based on an image that only a human can read.

Why can't these sites do this every time you sit at a table, and if you've been at a table for a long time?

There are so many ways to prevent bots, that I dont see them as a big problem in the long run. Why these simple prevention measures havent yet been taken is beyond my comprehension.