@LaurieMarlow
What a load of nasty fuckers on thread. 
A family enjoying their garden at 8.45. It’s not exactly late is it?
You sound very angry and rude. People are not on about people enjoying their garden at 8.45pm, they are on about neighbours being screechy, shouty, and wailing at that time!
And to people who have a job, a family screeching and yelling at almost 9pm on a weeknight IS a pain in the arse, because some people have kids under 8 who are in bed by 8pm, and some have to be up early for work. (Some people have BOTH scenarios to contend with!)
It's very selfish of you to think it's OK to upset others with late night noise, just because YOU don't have to be up for work and can lie in.
You sound like the people the OP is on about. I would rather be a 'nasty fucker' than someone who is 'entitled' and gives zero shits about anyone else, and tells them to 'get over it' if their squealing and inconsiderate shouty parents bellowing at 9pm is pissing them off.
And as for the 'move to a big open space in the country' if you don't want to hear neighbours as a few other posters have said; yeaaaaahh, coz it's SO easy for people to do that, because homes in the country are soooooooo cheap. 
And I think many removal firms, and solicitors, and estate agents, work for free now! 
As @ifCakeHappens, said if you want to behave like noisy louts and have your family screaming and shouting and squealing into the night, maybe YOU should move to a big wide open space away from anyone else.
Some people on this thread! 
As I said, I used to live in an area with noisy, bellowing, screechy neighbours - the adults AND the kids, and I moved to get away from it. Don't get that problem now, as it's a different kind of area, with different type of people living here.