Some Parents never fail to amaze me in their attitudes, never more so then when they contradict themselves. .. and this mum was no exception. I won't repeat the conversation word for word as she must have repeated some phrases to her mate 10 times I'm sure you'll get the idea tho.
She was retelling a scenario from a few days ago where her 9 year old daughter was playing music from her phone on the Tram. She admitted that she agrees music should not be played in this way and headphones are appropriate, however they were only going one stop (so that makes it ok).