What i want to know is why are they searching online for a stranger to come to their house? You would think they would check with their friends or at church to see if anyone would recommend a sitter they used in the past. Maybe they already burned bridges with all of those sources and got blacklisted. Maybe the boys are like the one in the movie Problem Child. I would hope if they decide on a teenager, that their parents are able to inquire about the people their kid will be working for.