Wondered if she was a more outspoken MumsNetter 
Got bus back from Town earlier and already on board was a Mum with her DD (3 or so maybe). They were in those seats behind the driver that some buses have , so 2 seats alone and seats across aisle. I sat bit further back but a woman who got on sat on the seat across from said Woman and DD
Anyway I will cut to the chase .. The little girl kept shouting and screaming, Mum was telling her to shussh, quieten down etc etc .. Well the Woman who was near them kept sighing, very loudly. Then after scream 3 said "Can you not put a muzzle on the kid?!!" . I was :O (shocked look) and waited for WWIII to break out , which it did. Mum of child shouting "who the fuck do you think you are?" her answering "a fellow paying passenger, did you have to pay for the kid?" . Bus driver intervened in the end .
Does anyone else think it was a tad out of order (what the woman said)? Ok might have been a bad day but still