Be(e) nice cuts both ways: I don’t find the superiority implication of the capitalization to be nice, and OP’s explanations don’t make me think of anything nice behind them.

It may boil down to something as simple as netiquette, where ALL CAPS MEANS SCREAMING, or AlTeRnAtInG cAsE means mocking… but the explanations seem to point more in the direction of asking to use MASTER/OWNER as someone’s pronouns. Not nice.