lurking troll 

A person who subscribes or follows a feed because it is so stupid that it makes them feel smart.

Unlike other trolls, a lurking troll won't vocalize their opinions.

Dan: Wow I got 5 new followers on twitter! I should keep making hilarious cat puns!
Dick: I don't know Dan, I bet most of them are giving you a mutual follow or are lurking trolls. Your life is pretty sad
Dan: *Cries*

lurking troll by Immunetalox May 28, 2015

Lurking Trolls

People Online Who Don't Comment, and Stalk Posts without Commenting unless triggered by something that normally leads to an argument.

"Those Lurking Trolls Keeps Downvoting me!"

Lurking Trolls by Cool Man Gaming Tan April 30, 2020