Just read this article on Jezebel and it's in the NY Post, too.
Basically, some parents want to ban ice cream vendors in the park (Prospect Park, in Brooklyn) because it leads to a battle between the screaming toddlers/kids who want ice cream and the parents who say NO!
I grew up with the ice cream truck coming around every single day during warm days and we only got it as a special treat. I'm pretty sure my mom didn't blame the ice cream truck guy for when we were annoyed we couldn't have any.
http://jezebel.com/5898248/brooklyn-parents-finally-prove-they-are-the-absolute-worst