And when the woman denied her husband was a military man, they laughed at her. For me, the totality of circumstances would be sufficient to pass judgment on them. Let them buy some stick-time and then what? They'll report you to the police? Given their ulterior aim, I doubt they would be willing to invite official scrutiny into just what they were doing at these people's houses in the first place.
Somebody comes over to my house (which is a threat in and of itself, because it means they sought the person out and were bold enough to actually show up there) and starts making implied threats to a family member? Oh, it's go time. I don't GAS about legal technicalities at that point.
