I would push the "why don't they keep them in cages until they're 10?!" thought out of my innocent sympathetic mind and try to get my mental peace,which was disturbed por the obnoxious little nudist, back. At a later hora preguntas like "was the kid lost?" will occur más in the form of curiosity than in that of worry and be automatically replaced por my much más important plans of world domination.
Honestly, I'd look and think, "Well, who was the fucking idiot that let this kid go in the nude and run around like that with no adult supervision and not worry about a little thing called pedophiles?" on first impression.
That's probably not good, but it sounds like what I'll do the most. :/