We don't get that much happening in Australia.
When we do, the parents usually pre-arrange, or are waiting by the gate.

You are more likely to get needless vandalism out here rather than anything else.
Last year I had some numbnuts throw an egg at my car as I went past. Almost caused me to crash. At 100kph, an egg quickly becomes a lot deadlier.

The security guard at the supermarket got held down and spraypainted in the eyes. Lovely!