Actually, when you bring a real third-world child into Toys-R-Us, they’re much better behaved than these ‘larvae spawn’ you’re referring to... they’re seriously fascinated by every little thing, and you end up standing there trying to explain both the purpose of an animatronic ‘fur real’ raccoon toy and what exactly a raccoon is, or why Barbie looks so ‘silly’ compared to real girls, and tell them all about dinosaurs, and ferris wheels - it’s so much fun for everyone involved =) and they’re generally way too respectful to do anything like you mentioned.
However, it’s the entitled spawn of the career welfare family groups (the ones who think the solution to their financial woes is to either have another baby or start dealing drugs) that you’ve got to watch out for, and they’re the ones who’ll take those roller-skate shoes into the mall and take you down there, too, then whine about how you got in their way... I knew a few too many of these kids growing up =(