Can't be too careful
I avoided considering becoming a teacher because I'm male and didn't want to expose myself to the risk of accusations. I know a gay guy (in the closet) who is a teacher, who has just been falsely accused by female students and it's guilty until proven innocent. School kids run rings around teachers these days if they want to because they know they can.
I honestly don't understand why anyone with a penis would consider working with children given modern societies disturbing obsession with paedophilia.
The safest way of dealing with other people's lost children is to resist the urge to try and help them or feel sorry for them and to pretend they aren't there and never make eye contact. If all else fails, punch them in the face. For god's sake don't take an interest in simply helping them find their parents, unless you've got tits, then you're OK.
(Satirical posturing aside, please don't actually punch other people's kids in the face, screaming at them and running in the other direction should suffice)