HALLOWEEN DECORATION inflation has already taken us leagues past gap-toothed jack o’ lanterns and cheesy cobwebs (Americans will spend $2.4 billion on decorations alone in 2016). Trending waves of tree-flattened witches, tombstones, inflatable spooks and laser-sculpted pumpkins have been raising the bar for a decade or two. This year seems to be skeletons’ (and their pets’) turn in the spotlight, and hanging up some cardboard cutout or even a 3-D one, unadorned, feels a little . . . well . . . bare bones. At MLB, we’ve noticed a new vitality, if you will, to the various Bony Maronies inhabiting our neighborhoods. Here, a collection of favorites, each with its own ghoulish flourish.