Do any of you remember the “bug” trucks in the 60’s?

We had trucks that sprayed insecticides that went through our alley’s once a month. It was a thick white smokey spray that smelled bad but was supposed to kill mosquitoes. My brothers, along with all the other idiot boys in the neighborhood, would ride their bikes behind it thinking it was fun. Did you all do this? Why the parents didn’t stop them is beyond me.