It’s harmless,but some lawn displays go too far with their fascination with death.
I had a friend who had three tombstones on her front lawn for Halloween decorations, with the name of each of her three kids on them. That just blew me away.
One thing my local nursery does is sell clay skulls at this time of year. They build them high into a pyramid. Every year I tell them: it looks like the killing fields of Cambodia - completely unappealing. They simply don’t get it. A pumpkin, a scarecrow, a ghoul...but skulls? Really ugly.