This is a quote from the book "The Gentleperson's Guide To Forum Spies" by Cryptome.org
...Spot a Spy (Cointelpro Agent)
read full book
5. Seventeen Techniques for Truth Suppression
COINTELPRO Techniques for dilution, misdirection and control of a internet forum..
There are several techniques for the control and manipulation of a internet forum no matter what,
or who is on it. We will go over each technique and demonstrate that only a minimal number of operatives can be used to eventually and effectively gain a control of a 'uncontrolled forum.'