Why are there teal pumpkins?

Teal pumpkins exist so that kids know which homes to skip during trick or treat. It's great that people want to include kids who can't eat candy, but it also gives a heads-up to those who don't want to waste their time. There are better things to do and more full-size candy bars to find. If my child were allergic to candy, then we wouldn't participate at all. It would be a relief that we didn't have to walk the neighborhood filled with displays of Wanton violence and Satanism.