Is your question rhetorical? I remember reading before that Facebook was creating shadow accounts for people that didn’t have actual accounts. They would build a user based on everything they could track, even attaching presumed names.

I use reolink cameras isolated to their own VLAN and strictly controlled. NVR is an Intel NUC with Coral running Frigate. It was the cheapest/best solution for me. Tough to find things that aren’t insanely expensive.