Has anyone considered that you might be dealing with someone who wants MORE decorations and is pulling the old "reverse psychology" trick? Maybe there is someone on the block who is wistful about the way the neighborhood used to have LOTS of decorations, and is now limited to a few scattered houses, and is trying to get people to out do their standard decorations.
Or it's a local store owner who ordered too many lawn figures.
PS- "blow up" = inflatable (not exploding) I would totally love an exploding Santa... I might tramatize the neighbors' chiiiiiillllldreeen though. Shucks.