Well not exactly overnight since I already knew alot of them where there before, but one day Google stop showing them. Well I checked Google Webmaster Tools like 2 days ago and had 72 today I have 13,939. Just so nobody ask me how I did this, it is on an adult website and have hardlink trades with 30 or so other adult sites and my link is displayed on each new page/post they create. Should I be worried much or just wait and see what happens? I only receive like 10-20% of my traffic from google anyway.