I currently work part-time at a preschool with 1.5-2.5 year olds and I often baby-sit for some of the kids in my class, and recently the 2.5 yo cousin of one of my kids, though I had never met him. I had never babysat for the kid in my class so his mother only referred me to her SIL based upon the fact that her 2yo son seems to like me. Now, I only worked there 3 hours a day, 4 days a week at that time, and the amount of time she met me consisted of 5 minutes a day when picking up her son. So how did she know I'm a safe person to leave with her barely verbal nephew? You might think it's because we're all screened with background checks, however in the year and a half that I've been working there, I know many people who also work there who were never screened. They simply forgot to get their fingerprints done and they're still employed, some working with kids 2 mos-1.5 years, kids who are not verbal. Was this mom a bad mom for leaving me with her son though she didn't know much about me? I don't think so, I think you have to take some risks and you hope that the outcome is okay. Unfortunately it's not always the case, but there's really little you can do to prevent that, as I have shown in my example at our preschool, where you think your child is with screened employees and in fact they could be any random weirdo. So leaving your kids in school while you're at work is just as much a risk as leaving them for a few hours on vacation, both are risks that to me seem okay to take. And yes, you can say that a babysitter you have at home is okay for your kids since you have heard form others that they're good. Well how do you know that? Because other parents said they're kids were okay? As someone else said, lots of abused kids don't tell and act okay, especially the youngest ones who really can't communicate to you that something happened. So the excuse that leaving your kids with a sitter at home is safer than on vacation really doesn't hold water, since that person was new to you at one time too and they really could have done anything to your child and you might not know about it. No matter where or with whom you leave your child, it's a risk, but it's a small risk in my opinion and to devalue another parent for doing so is ridiculous.