At this point Trulia Voices, you are really stretching to find a relevant topic. What should a homeowner do in regards to their neighbors property? They can't do anything. If that is a concern of a potential buyer, they should consider living in a subdivision that has an HOA, with Bylaws and rules against things like leaving a car out in the front yard up on blocks. However, some homeowners do not want to be living under the thumb of someone else, or under the Bylaws of a HOA.
Location plays a significant role in buying a home, it will impact not only the homes value but quality of life as well.
I think if you try a little harder, you can come up with better questions than this.