So...what if ADT decides that instead of paying multiple other companies to deal with this, they just...don't deal with it? They just file a report (or say they did) and continue taking money for "protection" despite doing nothing?
I guess this ancap's response would be "Marie would just switch to a competitor" but what if she's locked into a contract and can't do that? She would be at best blacklisted and unable to hire any security firms due to being "unreliable" and at worst ADT would take the money owed by force. Who would she call to stop the security company? The security company security, who exist to protect people from security company overreach? What if they aren't legit? It would just be security companies all the way down. Or you know, warlords, because that's effectively what this is, just with a sleek corporate logo.