At the risk of causing unintended offense, I’d like to offer a different view of such requests as “positive vibes only.”

It’s quite possible that those putting such a request out there are not trying to force anyone to be positive, or to exclude anyone.

Rather, perhaps they’re themselves having a hard time coping, and are simply trying to minimize external (to them) negative or challenging emotional inputs.

I understand and respect that many people suffer from mental health issues either episodically or chronically, and wish for healing for all, but that doesn’t mean that it’s unacceptable for someone to try and maintain as positive as possible an emotional environment for themselves.