I generally agree.
While I don't have kids I do understand parents can't keep an eagle eye on their children 24/7, every minute, every second. Letting them play in the yard while you're in the laundry room/writing bills/watching tv, letting them play with other children and parents in a restraunt or park while you use the restroom, that sort of thing.
I can't condemn the couple in this story beyond bad judgement at the wrong time, for I wasn't there - perhaps they had a reason they felt safe leaving their child alone, such as being able to see their apt. door from the restraunt window or something similar - but if these parents were on vacation and wanted alone time that badly, perhaps they should have found someone to babysit and made the vacation a 'parents only' journey.
I only babysit for one of my friends. And he's the kind of friend you'd hide a body for. in fact I have three of those. But only one I'd babysit for. You follow me?