Presumably, the problem was the truck music, not the ice cream sales. There's a market opening for a travelling ice cream seller who doesn't play loud, obloxously noise on loop after 7pm.
Our local ice cream truck plays a very annoying jingle, coupled with a woman's voice saying "Hello?" in an obnoxious way. I haven't complained, because I'm not that kind of asshole, but something about that voice clip feels like stubbing my toe over and over again.
If it were a regular jingle, I'd have no problem. Perhaps one that could be turned down so you don't hear it from halfway across town.
The "hello" is bizarre. It's like something a weapon AI from Metal Gear Solid would do to flush out its enemy.
The tune is also weird. It's not a recognizable folk or children's tune, and it sounds vaguely Japanese, like background music from a Sega Pico game.
If I heard an ice cream truck playing this come down my street, I'd think I was in an episode of Black Mirror, or some sort of analog-horror scenario. I'd do my best to find a good hiding place and avoid being seen. (Maybe crouch in a cardboard box?)
Someone else involved in the conversation suggested they could announce their times and locations on Facebook, which I thought was a good idea, but I guess it conflicts with their preference to not have a fixed schedule. They just drive round till they make enough money and then go home when they're bored.
If it were a regular jingle, I'd have no problem. Perhaps one that could be turned down so you don't hear it from halfway across town.