Friend said when you take public transport you have to expect you will hear things like screeching children, see mess, and shouting etc.
I said you have a duty as a parent to ensure your children learn how to act in public and not make mess or screech or shout where it's controllable.
We disagreed.
IABU - if you take public transport you put up and shut up because children and families can be loud and messy
IANBU - as a parent it's a duty to keep our children under a semblance of control in public and not make excessive noise or mess