You've never once seen something and felt something was a bit off?
You're never able to read a person?
You don't think people working in a restaurant can't put 2 & 2 together and come up with 4 more times than not?
So, you see a person come in with different children repeatedly and act above & beyond affectionate to them. Inappropriate caressing/touching?
You don't think that's gonna set off alarm bells in the staffs' heads?