You seemed to have escalated the brewing argument..
You called the Gardai! for kids..you have now escaleted it even more!
Now the parents have the Guards calling to their hall doors .
Then you get the residents association involved..
I would say that some of the parents would not be too bothered that you are upset, once you ,wrote letters,called the guards and got the residents association involved,and it appears they have succeeded!
Here is my advice for what its worth..
For example,People with very young children have no idea what its like to have a ten to teen..I have seen parents whose kids are babys and they boot up the roads in their cars,until..the day their kids need to go outside to play and suddenly they are all over everyone and anyone who goes faster than 10km.
They "forget" they did it for years themselves,and how it felt to others.
So lets look at things from their point of view,
Their kids were out playing,the sun has arrived,the kids are in their sights playing basketball,then they get a letter,then the Guards are called,then the residents association are informed.
Now you have got their backs up.
I would suggest that if you contuine to complain in the manner you have been,you will dread living there,and that is no solution,you may end up moving the kids,but the neighbours will despise you and make life a misery
It is wrong of them,but its almost garenteed that it will be nothing to do with you wanting a bit of peace and more to do with letters,Guards etc.They will become entrenched.
If I were you,I would look for a solution that will bring me some peace now and into the future,so how do you do this?
Firstly DO NOT escalate the situation..
If you are seen as a fair and reasonable person,it will stand to you.so dont go overboard.
The next time the kids are out playing,go out and play with them,bring one of your kids with you and let the other kids get to know them,pretend that you want them to show your little ones how great they are at basketball.
Then after a couple of nights ,say kids you know what little" johnnie" is sick,I think he will have to go to bed early tonight,but he loves you guys and wants to play with you,then ask them have they any ideas how you can get him to bed without wanting to play out with them?
There will always be one who will want to please you and they will suggest that they move a bit away,while you are trying to get "johnnie " to sleep.
You then go on to tell them how brilliant an idea that is,and what a great kid he is for helping out..
So what Im saying is,you are always better off making friends with them.
If the parents nose has been put out,you have a double problem,in that the parents will now actively encourage them to annoy you.However if the kids like you,they will be less inclined too.
It is always the case that those who like you,are less likely to want to upset you,the reverse is true also,that those who dislike you will want to upset you or at least not take your feelings into account.
In the past I have dealt with young couples moving into their lovly new homes with their lovly new kids,and wham ,a neighbours kid does something they dont approve of,the situation escalates,and now its the parent against parent,whereas the kids have forgotten all about it.
I understand the kids and the parents are being unreasonable but you have to fight this in such a way that you get the best outcome,if that means having to bite your tongue,having to let things go,overall you will be happier.
I hope this is of some use to you,I understand that as a parent with a young kid it is stressful and annoying,but you need to box clever and get your needs
met.
Failing that, when your kids are old enough,teach them to play basketball outside the exact same house/s that were prepared to make your life a misery!