If I were a google employee, and had the duty to protect my investors (not to mention having a duty to provide for the welfare of my family), you can bet that I would be on the forums. You can bet that I would use the money that was allocated to me to purchase everything offered at DP that is advertised to manipulate SE results and rankings. It wouldn't take long to get an idea as to which sites are associated with dubious activities. And if I were a google employee, it would be easy to punish these sites and any other sites that attempt to manipulate their own rankings using the dubious services offered. Advertising dubious "techniques" in a forum is akin to telling Google, "Here I am! Please kill my site's rankings! And kill the rankings of all sites that are connected to my site!"
linking-to-digital-point-harms-your-rankings ? http://www.blogstorm.co.uk/linking-to-digital-point-harms-your-rankings/
they definitely watch this type of forums which is, IMHO not good because it makes us not willing to share shady or gray area tactics and/or experiments.
They are sure here watching us. The big question is "In what form?". Are they really humans like you and me or BOT ??