Calling security and saying a missing small boy does make you a Rasha, these places take missing children very seriously and might send out security people to find them and waste resources that could have been better used for real danger.
Reminds me of a story I once heard, A guy was going from Teaneck to Washington Heights Friday afternoon and was delayed. Shabbos arrived and he was stuck on the George Washington Bridge and he pulled over and walked from there. The Port Authority police seeing an abandoned car on the middle of the bridge though it was a bridge jumper and sent out divers to find him (endagering their lives). he found this out when he tried to retrieve his car from the pound