Answer: lurked

AnswerCrossword Clue
LURKED

Hid in the shadows

LURKED

Read but didn't post, at a Web forum

LURKED

Went furtively

LURKED
Read chat room messages, but didn't post
LURKED
Prowled.
LURKEDLay in wait.
LURKEDLay in wait
LURKEDMoved furtively
LURKEDKept one's own counsel, online
LURKEDActed suspiciously
LURKEDWaited in hiding
LURKEDWas behind the arras