Ok, I've read a lot before posting this thread. Google seems to be very smart with cheaters, but I have a question: I have a website online since 4/5 months with good and unique contents a traffic bot that can surf my website for minutes and browse throught pages and simulate clicks (usefull for banners). This bot is able to surf banner's page too for some seconds/minutes a 500+ list of fresh ELITE proxy everyday. My plan should be to let 300/400 IP surfing the site during the day and let 3/4 of them click 1 time on banners to remain under the 3% threshold. I don't want to get answers like "good plan to get a ban", "play with big G -> ban". I would like to know how Google can caught me, did you tried something similar?