Re: borders, as a postie, I think some people feel it's only, at the very least, their right.
On my round the number of fences that have gone up between neighbours (thereby making me walk further ) is notable. How many people have removed fences? Zero. You also get strategically placed plant pots and wheelie bins to create a cheaper border.
Then you get people who argue and fall out with their neighbours because they've put up a new fence a couple of inches inside what they perceive to be their property. They should try having a neighbour who has a hedge, an ever encroaching barrier that requires you to spend time and energy on every couple of months.
Myself, and I know there at least some people like-minded, really couldn't care less. Always makes me laugh when people say if we hadn't won WW2 we'd all be speaking German now, as if that would've been the worst thing to happen under Nazi rule. Couldn't care less which language was my native tongue.