I think it depends on where you live here in the UK - maybe? I've got friends with children here - they attend their local CoE school & it seems the kiddies have Halloween parties & dress up & all that. Plus the two places I've worked have encouraged employees to dress up on Halloween day & I think they also take up a collection for charity at the same time.
We have had a few trick-or-treaters in our neighborhood -- but the first year I didn't buy candy because I wasn't expecting any, and then we weren't home another year, and then we just weren't in the habit of buying candy for them. Last year, I think there may have been one or two knock (ignored

) -- which hardly justified going all out for it. Plus, by the time we get home from work, it's quite dark & maybe getting late for the wee ones to be out here? (perhaps explaining why there weren't many who knocked?)
Steve doesn't see what the big deal is -- bah humbug.

Plus, he says - just wait a few days & then you've got Bonfire Night - with fireworks, setting the man on fire, toffee apples & parkin cake.
One thing I don't get here - related, but different holiday... When I was a kid, I used to enjoy going Christmas caroling (in the US) either with my friends or with church groups, and it was a cool thing to do -- seen as being nice to your neighbors & elderly shut-ins, etc. We didn't go caroling to get anything - although sometimes you might get offered a cookie or some apple cider, etc. Here the Christmas carollers expect you to pay them money!

So then (like one time we didn't have any change on us) you don't answer the door, cos if you do - they carol you & think you're cheap if you don't pay them. What's up with that?