Shari, I actually have a girlfriend who was the victim of an attempted kidnapping at a nearby mall when she was 5 or 6 yo. The guy took her when her mother’s back was turned, mother notified mall security, but he was caught at the store exit. She remembers this incident. I’ll ask her if she’s offended by this sign.
I still think it’s context-driven. Insensitive if there was a recent situation, but otherwise it’s just a moderately amusing trope.