As long as they only leave it up for the Holidays, no big deal.
My s-i-l used to live next to a house whose front yard contained:
a small gazebo
two lion statues flanking the driveway
a little jockey statue - used for hitching the horse reins to, maybe
a 2 foot in diameter glass "emerald"
too many shrubs to count, many half dead
The house had a bright green roof. And the yard is small. My s-i-l moved.
We still drive by to see if that stuff is still there - yes, it is.
Skin kids - Jason, Kevin, Allison
Canine kids - Bennett & Bailey (always in our hearts), Riley, Banker, Rogue and Boz
Feline kids - Zoey, Talley and Abra