CainIV - 8:19 pm on Sep 25, 2009 (gmt 0)

Parasite hosting, or hosted EDU links are very important to look out for.

I think that it is really a 'combination' of factors that increases the effectiveness of that type of campaign.

All the more reason why webmasters should be able to 'claim' link responsibility in Webmaster tools as other posted have previously suggested.

Has anyone ever setup a controlled test for this on one of their own domains?