So, children need to learn to shut the fuck up but adults aren't required to use basic manners?
haven't seen anyone suggest that here - what is being suggested is that children (and their parents) learn some consideration for their neighbours, and were asked (how is asking not manners??) to take their singing indoors after it had been going on for an unreasonable amount of time, at an unreasonable time of day. Yes, they were in their own garden, but the noise they were making travelled, so not at all unmannerly to make that point. Gosh, can't believe all of that needs explaining!
Perhaps you ought to be the one moving to the backside of nowhere if you can't cope with the basic manners needed to get along with your neighbours.
(FWIW, we had neighbours (pre-DD) who had their toddlers out in the garden at 7am every fucking day. I never said anything to them, even though I got totally fed up with being woken up at that time every bloody weekend. I asked some of the parents at work if I was being U in getting pissed off about it, and no-one thought I was, they all kept their kids in, or took them to the park, until a more reasonable hour, like 9. Thank God for real life, eh.)