Your neighbors and county can certainly challenge the use of "your" land. I think you're assuming that ownership means you can "do whatever the hell you want". Ordinances, zoning, right of way, eminent domain, and federal regulations often restrict what you can do and may require ceding control of parts/all of your land, and if your neighbors are really pissed, they could certainly raise hell and make it very difficult.
Of course, this, I believe, the person I was responding to was somewhat implying and what I was hoping to hint upon in my comment. The discussion around nuclear, and really most politics, is around ownership and the limits to what you can do with what we call 'yours'. Just because I want to personally dump a bunch of waste, unprotected from my neighbors, doesn't mean I should be allowed to potentially pollute their land or contaminate their water. I find it far easier to have discussions like these when you remember that land 'ownership' (in the US anyway) is really a lease agreement to the government and your neighbors, our country may use the word ownership, but it really isn't in the most literal sense.
