Hi with all the negative link thing that google has done in their recent updates, I am scared of building backlinks, because i dont know if it will end up making my rankings worse. before, worst case was that a link didnt count. now it can have negative value, that sucks. and I dont think this is just a rumor. This past week I made 20 web 2.0's and I blasted them using SB. I did not directly blast my money site, just the web 2.0's, and my site ended up disappearing off the face of the planet. so I am scared of doing anything. how do I know if a link will have a positive or negative effect?