Yeah, that was before the razors-in-the- apple trend. :/
True. It's not as though that kind of thing didn't happen before; but, once it got blown up by the media, there were probably a few copycats. Plus, everyone started to worry about anything that wasn't store bought and wrapped.
Worked both ways, too. People who hand out treats have to be concerned about getting blamed if someone claims their stuff harmed a child. Safer to buy factory wrapped stuff for treats.
Even so, I bet there are small towns where people know each other better along the trick-or-treat routes and Mrs. Murphy still hands out her famous caramel apples, ... .