The reason I run one is because of other people that have access to my living area, as in the landlord, maintenance guy, property management company etc. They seem to think that possession of a key entitles them to whatever they want.

At multiple locations and every area of the price spectrum, from indies to bigcorps, I have had my rights and privacy violated. So I keep a camera so I can know about it.

At 2 locations now I have used footage to break my lease early with zero penalty. Never got actual charges pressed against anyone but just with that it has paid for itself multiple times over.