If you automatically assume somebody approaching a child is a kidde fiddler (!) then your society has problems.
I'd call security too. Not my monkey, not my circus.
Take off my uniform.
My partner spent several years in childcare, both at centers and as a nanny. We're out in public and she sees a crying child? She goes to it, talks to it, hugs it perhaps, reassures.
Me? Not a chance. For better or worse, societal conditioning is that that is something I as a male /do/ /not/ /do/. Because it's nefarious that I'd even want to.