I used to drive through state parks and playground parking lots with my grandpa playing music from our car like an ice cream truck
Was anyone else with you?
Yes, my dad laughed at what we did.
While playing pranks can be amusing, it isn't appropriate when it is done to complete strangers. You shouldn't drive around playing ice cream truck music when you aren't actually driving an ice cream truck. It not only bothers people but it also causes them to get up and waste their time when they think an ice cream truck has arrived when one has not.
I'm a kid, and it was hilarious.
It is wrong to prank people and disrupt the peace. Especially if you are at a park it might even be dangerous if kids run into the street.