I have never been Trick or Treating. It wasn't a thing when I was growing up, nobody did it. I'm not Scottish, Irish or American and have no frame of reference for it other than TV and films.
DC have asked for a couple of years and I've refused (because it's weird to me. Because I have no experience of it and I never expected it to become so big that it would be something their friends were doing).
However this year DD has been invited to a Halloween themed birthday party after school on the day with the expectation they all head out afterwards so I can't really just take her home when all her friends are going.
So what do you actually do? Only knock at housed with lights/decorations. And then just literally "say Trick or Treat?" and get sweets? Is there other etiquette? Does anyone else do it and feel really uncomfortable about the whole thing?