I agree with GIB & PCG and with you for your precaution, But the question asked is an interesting one of national behavior. I lived most my life in Spain and I don't think there is a safer place for kids than there. Its all family there and your child will always team up with another family and wander off.But the parents always give you the nod first. Single people generally are not in the picture as they tend to avoid family set ups so a lone stranger asking a kid to accompany them would stand out like a sore thumb.But when we took our little one on holiday with us the first thing we bought was one of the elastic wrist bands so we could keep the little terror harnessed to one of us at all times!!