But on a more serious note ....
Dear USA
Please do your mother country the honour of obliterating the ghastly custom of 'Trick-or-Treat'.
That way, the moronic sheep in The UK who seem intent on blindly assimilating and devouring any and all Americana will have to find something better to do with my time.
May I suggest you revert to the time-honoured British customs of telling a few crap ghost stories and bobbing for apples. In your own homes that is, not mine.
Thanks!