1script - 7:14 pm on Apr 11, 2013 (gmt 0)
This sounds possible and perhaps even likely. The question is though: what to do when this profile catches you as a false positive? Stop posting and participating in the community?
Couldn't you argue that a site that has, say, 80% of its inbound links as "nofollow" fits the profile of an unclever spammer who drops links on forum/blog sites?