I dont think they could do it the same in Britain, the parties and dressing up yes, but decorating the houses and streets like they do here, no.
Peoples attitudes are different here, well New Hampshire anyways, no one would think about vandalising or stealing the decorations. 
Some of the scarecrows have props, the one outside the bike shop is sat on a bike, hardware store one has a chainsaw, one of the pubs has a lot with drinks trays etc. They just wouldnt last in my home town, shame but thats the difference between here and there.