Just a week or two ago I was in an airport and there was a couple with their child, maybe 2-3 years old (just old enough to walk on their own, you know that slow step by step walk with arms in the air) They were not paying attention to them at all, they were walking in front of said child, I was even able to get between them and the kid, blocking their view of it. It wasn't until I got past them that they even thought to turn around and see where their kid was.