Ah yes, a sub which was formed 9 years ago. Also they seem to be relatively decent when they specify what genres they want posted:

Please post songs matching these subgenres in their own respective communities. If you are uncertain, verify that it has a band page on Metal Archives and does not fall under any of the previously listed genres. This is not because we dislike them or discourage listening to them, but because they fall outside of the scope of this subreddit.

And that's fine. No animosity needed, no disrespect, no need to turn red every time someone posts a band that maybe might fall into another category. Just be cool and say that's outside of the scope of what we want to have posted. Fine by me.