Yes but the commercial aspect and the trick or treating didn't origate here. When I was little people had hallowe'en parties but you could't buy all the decoratsions etc in the shops that you can now. You couldn't even get pumpkins, I had a swede lantern! The article is right though, what we have now is not really the American tradition either, it's a bastardisation.
Although Halloween was first commercialised in the US, it really wasn't so commercial until very recently. There were pumpkins, of course, but those are around at Thanksgiving too. I remember as a kid in the early 80's that buying a pumpkin, and sitting at the dining room table with my mom and my sister carving it, was most of it. Costumes were starting to become popular then, because I do remember getting excited about my mom buying a Darth Vader costume. The other years I either wore a sheet and went as a ghost or dressed up in a clown costume (lol). And of course lots of candy was purchased.
I don't remember people decorating their garden or their front door with orange lights and all the bric-o-brac that's around now though - at least a couple of aisles of every CVS, Walgreens and Rite-Aid here in the US is devoted to that stuff starting in mid-August!
Our house (my parents') got "t.p.ed" ("toilet-papered" - toilet paper spread all over the trees) one year. There's the occasional egg-bombing or pumpkin smashing but that's it. No firecrackers, that sounds odd - but I guess it's a Guy Fawkes Day thing. The last place I rented was a house in a sort-of-bad neighbourhood and some of the neighbours celebrated their own holidays, in the middle of the afternoon or at night, by shooting off fireworks. South Carolina is one of the few places where you can legally buy, year-round, a lot of fireworks ("bottle rockets", etc.) that are banned in other states. People actually DRIVE here from all over the East coast to buy fireworks! I guess everyone's gotta celebrate pay-day!