lurker

/ˈlɜrkər/
noun
  1. A person who waits or moves in a secret or hidden way, often with a bad intention.
    • The lurker disappeared into the woods when the lights came on.
    • Neighbors reported a lurker in the parking lot late at night.
    • The security guard spotted a lurker near the fence.
  2. A person who reads or watches online content without participating or posting.
    • As a lurker, I learned a lot before making my first post.
    • The chat room has many lurkers who just read the messages.
    • The website encourages lurkers to create an account and join in.
Antonyms