We had a great traditionally 'British' kids party last night - apple ducking, flour tower, Nelsons bones.....
Our kids and the Cypriot kids had a great time (and the adults had a few glasses) with no trick or treat. Kids love gore, dressing up and scary stuff so I would suggest everyone lightens up and sees it for what it is - a bit of fun, not an excuse to insult other cultures.
Personally I like any excuse for a get together!