Here are two annoyances:
Composers who claim that nothing more can be done with tonality because so many composers have used it in the past, so that it is now exhausted. You might as well say that no more poetry can be written in English for the same reason. It just shows a lack of imagination.
Composers who claim to "reinvent musical language" with every new piece. For crying out loud!
On more reflection, I come to think about non tonal music as use of an expanded pallets. Though most of my compositions are tonal I make an occasional foray to the 'dark side'
Chaos: The Sedimentary Lines of the Grand CanyonThe expansion of "tonality" into areas that some might describe as "non-tonality" or "atonality" has only served to widen the expressive capabilities of music. I don't know why "atonlaity" - whatever that might mean to whomsoever - should be regarded as some kind of "dark side" as though this could and should be thought of as its only possible manifestation.
When I said, "Dark Side", I was being very tongue and cheek. I have participated on other sites where anything but conservative tonality was described by a couple of users as, "Disgusting". When I suggested to them that They needed to get over the fact that Robert Schumann was dead, they weren't happy. LOL
I imagine that I might just be able to guess one particular site to which you allude, but no names and all that...