sometimes, the parents do try and the kids are just... horrible. i've seen kids shouting at their parents, etc. and it's actually disgusting ndjhgfjsg u shouldn't bite the hand that feeds u my dude !!
but people who just turn a blind eye to their kid's misbehaviour is honestly dangerous. especially in cases such as parks where there could be accidents involving another younger/more fragile child (some kids are brats and push children off swings/slides/climbing frames... need i express how this can be harmful even with the 'rubbery' type floors found in parks?) OR in places such as shops with elderly people, u could knock down an elderly woman or man and really harm them !!
not to mention u gotta keep your children in your sight, because you never know who is about. even the most 'harmless' looking people can do horrible stuff.
when i was younger my mum kept my brothers and i (we were all born about a year or two apart) in safety harnesses, she used to pull on them though and they HURT but they taught us to stay close to her lmao.