Picture this. Every time you leave your teenage kids home alone for a weekend, you come back to stink-eyes from your neighbors, a living room that’s a sea of empty beer cans, a yard filled with cigarette butts, and a pregnant cat. Pretty soon, you’d stop leaving those kids to their own devices, wouldn’t you? If you had to leave town, you’d find a sitter. Maybe a retired Marine uncle. Or a friendly cop to send a car by the house every half hour during the dark hours. But you wouldn’t let the behavior continue.