Ok, 2nd night running that people have boarded the quiet carriage on the train with children who have either screamed or ran up and down.
Now I have no problem with children, I used to be one and have three of my own, but AIBU to think that on a train with 8 carriages, 2 of them clearly marked from the outside as quiet ones should be avoided if you have babies and preschoolers?
It left from the start of the line, so it's not as if it pulled in and by chance happened to be where you were standing?