The Lurker, by Mike Reed:
Lurker does not participate in normal forum discourse, but he's out there...watching, reading every message.
He is usually quite harmless, and more often than not his silence reflects a natural reticence rather than sinister motives.
If a fight breaks out he will quietly observe to avoid revealing his position.
Occasionally, however, some mysterious impulse drives him to de-lurk and attack.
This totally unexpected assault is universally regarded as an ambush, and other Warriors will turn on him savagely.
Lurker seldom sticks around to fight it out, however, and after a brief exchange, he once again slips out of sight.