Bit freaked out- was picking DD up from choir and it was busier than normal because they do an open dress rehearsal.
As we were leaving the school, a wee one had obviously got separated from his Mum and was wandering right out 
Obviously I stopped and took him back in, but I could have been anyone and the wee soul was so trusting.
It's never been something I've thought about with mine, because tbh I've always just hammered home 'DO NOT GO ANYWHERE WITHOUT ME' but accidents happen plus my DC are getting a bit older now and I'd like them to go to the shop etc.
My dad used to always tell me to sit in a train carriage with a woman or ask a mum with children, which obviously isn't great advice really!