Remembering to look for and ignore folks with that telltale indicator has made the fediverse so much more enjoyable.
Words mean things, if you don't fit the definition for a political ideology or movement then you're not in/a member of it in any meaningful way, also there's a long and extremely well documented history of US intelligence agencies infilitrating leftists groups so gatekeeping is actually just 100% necessary and anyone who says otherwise is either a moron or a fed