incrediBILL - 5:08 pm on Mar 25, 2012 (gmt 0)
I say make everyone do a CAPTCHA - LOL
I fail to see the humor here as I practically do this already.
Detecting mouse moves, key presses, etc. are all forms of a CAPTCHA so you can tell there's a human at the browser selecting menu options and typing in data.
Showing a box with squiggly lines and text is old school and intrusive.