Should have lied and said you had kids OP…
I disagree with the shaming but I think I understand what you are trying to say.
I assume you aren’t talking about normal tantrums or kids with SEN, it’s the parents who bring their children to a pub or restaurant and chat amongst themselves whilst their kids run between tables, parents who let kids run riot around supermarkets, who bring children to the cinema and let them talk though films or as a pp mentioned the people who park kids by the toys in charity shops and wander off.
This is different to a toddler having a tantrum because they didn’t get sweets or an overwhelmed child having a meltdown whilst their parents are actively trying to calm them down - even if this means riding it out and leaving them to it.
I think it’s a small minority but it happens, I’ve seen people called out about it on threads before, the one that sticks in my mind is the woman who posted saying she let her kids run round a hotel lobby then couldn’t understand why people were annoyed and someone who posted on the same thread saying she let her kids run up and down the corridors “after 8am!” They were called out about it on the threads and the majority agreed they were BU.
Shaming wouldn’t work as they don’t think they are in the wrong, most people do their best to make sure their kids aren’t disruptive but it’s not always possible.
I think you had the responses you did because you don’t have kids and people automatically think you are judging any parent whose child has had a tantrum or played up in public.
I read your post differently and assumed you were frustrated from lack of parenting rather than just randomly judging any child making a noise.