As far as numbers go, sites like FR are insignificant
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I don’t know about that.
I’ve seen phrases and words used here , then begin hearing them on mainstream media.
( remember, imitation is sincerest form of flattery )
For example.
Incompetent or complicit
( that one shocked me /-)
Grifter
Ilk
Weasel
and the most recent
Crap.
Watch for this one next
Tripe.
I think many of those words and phrases were brought here from other Social Media places like Twitter and Facebook.