Gatekeeping
Etymology
From the literal gatekeeper who controls a gate. Social science adopted it — Kurt Lewin used "gate keeper" in the 1940s, and media studies developed "gatekeeping" for how editors decide what news passes through. Internet subcultures narrowed it in the late 2010s to mean policing entry to fandoms and identities.
noun · /GAYT-kee-ping/
Controlling who is allowed into a community or identity — policing who counts as a "real" fan, member, or insider.
What it names
It names the guarding of a boundary around belonging: quizzing newcomers, withholding information, or ruling that someone isn’t "really" part of a group. Naming it exposes an often petty exercise of status, treating shared interests as a club with a bouncer.
Example
Telling someone they can’t like the band unless they’ve heard the early albums is just gatekeeping.
Related idea
The controlling flip side of cancel-culture’s exclusion: gatekeeping guards the entrance, deciding who gets in rather than who gets pushed out.