Just as an example of how little things can lead to big problems: in one workplace a very nice older gentleman commented on a young lady's hair - a new style or whatever - but he used the word "hot". He never thought and probably never even understood that it could be taken as a sexual overture but his comment was overheard by another staffer and he lost his job.
That's a far different situation. We couldn't do that even in the military--you don't tell women at work they're "hot," period. They've been telling us that since the 70s--where have you been?
All it takes is one hint from one person who knows that you've been taking pictures of a minor child. Hell, I wouldn't do this even for a family friend with a parent present, signed agreements notarized and an independent witness sworn in.
That is rather silly to say on the "Business of Photography" forum where we take pictures of minors quite frequently as a matter of business. You have a parent or guardian present, they sign a model release--done and done...every day, all over the US.