In the podcast of Security now nr.593 ,Steve mentioned the relation between captcha`s and google. If you want to listen particularly to this subject,listen or watch from 1:43 https://twit.tv/shows/security-now/episodes/593 If you using Tor,you know captcha can be very annoying ; for me shift-cntrl-l until they let me trough without captcha.I know the key combi doesn`t work on every site,but can be useful. Have a good Day, Casper