Well yeah of course I want the owner to be forced to act in a way other than what he chooses because the way he chooses to act affects me negatively. That's why we have laws.

There are any of a number of things the owner could be doing with the property. For instance, he could build an urban farm and help provide the area with more food. There are property tax incentives for doing as such, but when you're paying less than $1000 a year for property taxes why would you go to the effort? So instead of using the land for something useful, it's blocked off with a chain link fence and laying unused.