Happy H you guys. It's one of those things we just don't get over here, don't "get it" at all.
About the only thing that happens over here is a few kids in big cities go around attempting to trick or treat by slathering a bit of face paint on, no costumes etc then knock on peoples' doors expecting hand-outs which is a waste of time because I don't know a soul who actually buys in sweets for the occasion.
Haven't had anyone knock on my door for years and years & would die of embarrassment if I did 'coz I'd have nothing for them except a mouthful of "Get home to your parents, don't you know how dangerous what you're doing is".