Sitting outside the pub with sleeping DS. Four teenaged girls - say 14/15 years old - hanging round practising dance routines. They're being quite noisy but seem OK until a boy arrives to retrieve his coat. The girls chased after him repeatedly calling him a ''fucking Jewish prick". I'm totally stunned and would normally say something but didn't - mainly because I'm with the baby, but also as I don't know what I would say. I suppose I was unreasonable to say nothing but I was quite taken aback and a bit intimidated by them. What would you have done or said?