How on earth can you say "Find my Mac says my laptop is in your house." without saying they're a thief? Do you need to add "...I'm not saying you stole but it was stolen. Maybe the real thief stashed in it your cupboard?" Or do you add "...let's see if Find my Mac is broken?"
I'm not sure how someone would approach that situation. But I can say that if someone comes to my door and accuses me of being a thief, that interaction is not starting off well.