[wilsynet]

To lurk, to be in the state of lurking, and to be a lurker — has been around since the BBS days. Thanks for calling it out!

[pmontra]

I learned some English vocabulary with videogames. The first time I saw the word lurker was the lurker above in Nethack (or did rogue and hack already had it?) https://nethackwiki.com/wiki/Trapper