This is a quote from the book "The Gentleperson's Guide To Forum Spies" by Cryptome.org
...enly and somewhat coincidentally with a new controversial topic with no clear prior record of participation in general discussions in the particular public arena involved. They likewise tend to
vanish once the topic is no longer of general concern. They were likely directed or elected to be there for a reason, and vanish with the reason.
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4) Teamwork. They tend to operate i
n self-congratulatory and complementary packs or teams. Of course, this can happen naturally in any public forum, but there will likely be an ongoing pattern of frequent exchanges of this sort w...