We don't have 'trick or treating' just guisers. They have to do a performance, usually a little song or poem, or sometimes a joke. It's up to the householders whether or not it's been good enough to be rewarded with some form of goody.
Halloween decorations as bought in shops is just commercialisation and we don't fall for that.
It's noticeable that these days guisers are often accompanied by parents hiding discreetly. Perfectly understandable.
The number of guisers seems to wax and wane as they grow up and new ones become old enough to do it.
Scottish island ferries debacle. 🏴