So like... a couple people a year? As far as annoyances go, not exactly a big one.
Still, I'm happy he has this article now. He can just show it to the couple new visitors who arrive each year. Heck, frame it and put it above the doorbell...
Of course, it's also the perfect cover if he ever wanted to turn into an iPhone and AirPods thief... :P
In all seriousness though, I would be concerned if somebody ever did become violent. I'd definitely want the local police to be aware of the situation in advance and be ready to call them.
But also, the solution is maybe as easy as replacing your Wi-Fi router?