Yes! I'm so glad this thread exists!
Just last Halloween I went trick or treating with one of my good friends, and there were a few...special gems mixed in with out candy.
One lady answered the door and barked, "CANDY OR CHIPS," and after a flash of confusion, we answered candy. She gave us each a little ziplock bag with like, two pieces of candy in it as well as...a bunch of stickers that said "HOT" in all caps on them?? Like I got about 10 of these stickers in my bag? No idea what that even means but okay.
And then there was the other house that gave literally no candy, but a little slip of paper with about 1000 words worth of, "If you don't worship God you will burn and die in Hell!!!!!" Not. Even. Kidding.
And then we got some...spicy pineapple taffy or something? Which made both of us gag, pretty much.