Ubiquiti is one of those ones I've never fully figured out, I really like their products but logging in using the ui.com account makes it seem like there's at least some aspect the relies on a cloud connection and therefore offers access from outside, maybe I just missed a setting to set everything to local login only, I dunno, don't have my Ubiquiti system up and running anymore.

My landlord has those already. They're attached to the fence and there's no wire attached to it. I feel like most criminals are aware of these and aren't fooled.