But it's not a lesson if it doesn't explain itself. It just turns their comment into a puzzle that they know most people won't know how to read.

It's gate keeping in the same way as intentionally using technical jargon when common parlance would suffice. It's a bit insufferable.

If I need to Google what your letters mean then you better have something real damn interesting to say, otherwise I'm going to be annoyed. Especially since I don't have anywhere else to use that "skill".