Post by @paul
A non-superuser being part of "wheel" group alone cannot "shutdown" a #NetBSD host. Being part of "operator" group however overcomes that.
Feel free to test yourself if being part of only "operator" group but not of "wheel" would allow you to "shutdown".
@ax6761@freeradical.zone I think that's something in most BSDs - users need to be in the operator group to shutdown. You don't need to be in wheel in my understanding but never tested that.
I think also OpenBSD have changed theirs so the operator group no longer provides shutdown privileges, users need to be in _shutdown to do this. Good thing is, it's all in the documentation and release notes!