I just don't care.
You come in a group and not everyone says "trick or treat"? Meh, so what. Here's your candy.
You're a teenager not dressed up as anything? Open your bag, here's your loot.
You walk away without saying "thank you"? Not my favorite, but I'm not gonna worry about it.
You do the talking for your very capable-of-speaking youngster? Big deal.
I'm just here to give every Tom, Dyck & Sally a piece of candy/chocolate because it's October 31st.
And that's okay.
But as for MY kids...oh, they'd better follow my etiquette rules. Although now that they're old enough to go out on their own (!!!) I guess I'll never actually know if they do!