This is in some ways a fundamentally different pattern of usage, even while being superficially similar, to what a lot of other groups do.
I'm not talking about discussing something, or disagreeing, etc. The fact that I have to make this distinction explicitly should itself tell you something. Especially in places where there's a tacit grouping effect in place.
It's this "imma gonna show up with this complete stranger and show off how smart I am" with no further apparent goal.