Usually, Halloween is limited to being celebrated in gated villages and condominiums. The children live within the gated village or condo where the celebration takes place. In our village it starts out with a costume party at about 3 to 5 pm where there are prizes for different types of costumes. Then trick or treat is limited to 5 - 7 pm. A group of underprivileged children are also allowed to trick or treat within our village, but only with the permission of the Mayor (who lives in our village). I think that is a way of keeping it safe.
Also, not all houses participate on Halloween. If you want to participate, usually they put Halloween decorations on the front of the house. If there are no decorations, children won't go to your house.
Teenagers celebrate Halloween in clubs where parties are held. Sometimes they come in costume, tool