Now, i normally try to restrain from judging other peoples parenting ability, but.....
she had a baby in a pushchair, earphones on and a young child (3ish) meandering along with her - including crossing a main road. Poor kid was carrying/dragging some shopping with him, 'cos the back of the pushchair was full.
I felt so sorry for him The music was loud enough that other shoppers passing her noticed, and she didn't once talk or make eye contact with the little lad whilst i was watching (about 5mins).
I was walking behind them across town, not stalking
I just hope that they have more interaction at home.