Alright, so let's remove the extreme scenario. Let's go somewhere in the middle and forget about beer cans and rustbuckets. What sort of different uses of property are you OK with your neighbors doing? What if a neighbor wants to turn his front yard into a mini orchard? Or a big garden? Or build a shed in the back without a permit? Or paint his house an unusual color? Say, he takes care of his property and isn't trashy, but just uses it differently than you do. How do you feel about that? Where's your line?