This is a quote from the book "The Gentleperson's Guide To Forum Spies" by Cryptome.org
...pick and choose opponents carefully, either applying the hit-and-run approach against mere commentators supportive of opponents, or focusing heavier attacks on key opponents who are known to dir
ectly address issues. Should a commentator become argumentative with any success, the focus will shift to include the commentator as well.
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3) Coincidental. They tend to surface sudd
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 ...