This is a quote from the book "The Gentleperson's Guide To Forum Spies" by Cryptome.org
...pretend to spend their own money.
read full book
17. Flood the Internet with agents. This is the answer to the question, "What could possibly motivate a person to spend hour upon hour on Inte
rnet news groups defending the government and/or the press and harassing genuine critics?" Don t the authorities have defenders enough in all the newspapers, magazines, radio, and televisio
n? One would think refusing to print critical letters and screening out serious callers or dumping them from radio talk shows would be control enough, but, obviously, it is not.