Back at school in the UK, in the 70s, I read a book about traditions from around the world. It included a description of trick-or-treating as part of the “what people do in other countries” theme. We would put candles in turnips in that era.

In the 90s I had some kids at the door in costume but who got confused and said “penny for the guy”. Or maybe it was the other way around (they had a guy but said trick or treat).