I would value your opinions on this. My DD is 12 and probably quite grown up for her age as she has 2 older siblings of 21 and 18. She has a friend who's mum is younger and "cooler" than me, who offered to take my DD and 5 other girls (in a 7 seater) to an out door pool complex today. When we met she said "oh did you realise I won't be staying there with them?" I thought she meant she would be going to nearby shops, but she was off to work and planning to leave them for 5 hours! Knowing my daughter is an excellent swimmer, and quite sensible I made a snap judgement, grudgingly said OK as long as they all had mobiles and swapped home numbers but this other mum didnt know that. I was amazed that she'd offered to take them only to dump them there! In the end as I was surrounded by excited girls all ready to go, I gave in with reservations, she could tell I wasn't happy about it and I felt pressured into agreeing. Secretly I was mad that she was being so casual about other children's safety and later talked to another mum who agreed with me and had also let her daughter go but was very worried about it.
They came back safely from the pool but had had no lunch, my daughter was the only one with sunscreen which ran out and 2 of the girls decided to leave the pool and walk to the shopping centre 300m away. This mum had apparently told them that was ok!
Next time I will want a lot more detail before I agree to DD to be in that mother's care. I already refused an earlier expedition when she offered to take 6 girls 180 miles after school to watch a Rizzlekicks concert (standing only ) then drive back by 1am (on a school night!!!) . My DD thinks I'm being unreasonable as I am older and not cool...what do you think?