Buy the land from Walmart so you can do with the land what you wish.
Finally, the voice of reason. This parcel could no doubt have been purchased for a song in 2009. Neighbors probably could have taken up a collection and paid cash.
They just assumed the property owner would continue to provide them with the enjoyment of the lack of development of the vacant lot for free. Bad assumption. Oh well.
This is my weakness. The state I live in has bought much land to set aside for parks and conservation of wildlife. While I truly enjoy this, I know it is wrong at some level to use government in this manner.
If someone bought a piece of land and put something obnoxious there, my recourse would be to convince a jury that I have been harmed in some manner or buy the land myself or with a group.
The answer is not to use the force of government to harass a property owner with undue regulation on how they use their property when they are causing no one any harm.