londrum - 6:23 pm on Mar 8, 2012 (gmt 0)
there was a thread a while back about this. some guy (i cant remember his name) had a load of dodgy links and got an email from google saying he needs to totally remove them before he gets his rankings back.
google actually told him that he needed to remove the links from sites he doesn't even own, before he could get some respite. sounds crazy, but that is what the thread said.
i will try and find the thread