Cut it out.

Something I keep seeing everywhere on the web (though I suspect it’s been going on as long as people have had the ability to speak):  A group gathers with a common interest in some topic (their hobby, their place of residence, their job, their philosophy of life, etc.), and proceeds to discuss the topic at some length.  After a while, it becomes clear that the common usage of words is too inexact for careful discussion of fine points of interest.  So, they narrow the definitions of a few words, redefine a few words, maybe even invent a few words.  This greatly facilitates their discussions.  Then they encounter someone who hasn’t been part of their group, but who shares the same interest that led to the groups formation.  They are then shocked, SHOCKED!, to find that this individual is mis-using the terminology that they’d revised so long ago.  People being people, they then use this difference to mark the person, who should be an ally and a friend,  as an outsider, and they attack.  It’s so unnecessary.  Please, can we have a little self-awareness,  a little kindness, and calm the fuck down?  Thanks.