@Slv199... yes, that's a good point.
However, as I said, I don't see it as any different than leaving your children in the bed when you go outside to hang up the clothes... the chores HAVE to be done, right? If something happens in that moment, then are you a negligent parent?
I don't think so - I'm just thinking of my brother's house, where you have to walk around the side and up a long flight of stairs to get between the door and the clothesline, so if the children shrieked, you'd hear it from the clothesline... but it would still take several seconds to run around and up the stairs to get inside. My uncle's house when his kids were little had the clothesline right at the back of a HUGE yard - so it would take several seconds to get back to the house and again up the internal stairs to get to the children if they shrieked.
And would my brother or uncle (or their wives) be a negligent parent because they left the house to do a chore that has to be done?
A good nanny cam would tell you if the babies are in need... and a few doors down is close enough that you can be home very quickly. Although how often are children left alone in their bedroom to nap (or whatever), and the parent is in another room... but with no nanny camera, the kid gets hurt anyways and no one knows until they go check on the kid! Is THAT person a negligent parent?
I just don't think that things like this are as black and white as something you NEVER EVER DO because it's super high risk, or something that's 100% safe to do. It's somewhere in the middle, I think.