I think walking home alone late is a no-no too, though she did wait tonight until a friend could walk her home after the movie.
My youngest is 16 and is currently out at the late showing of the Avengers movie that started at 9.30. She and her friends met for ice cream first so they've been out since about 8.30. The pick up time will be around midnight. On a Friday I feel this is reasonable.
DD will call me when it's over and I will pick her up. She will hang around at the cinema door until I arrive. It's well lit there. We live in a very safe area, police are very responsive, there are lots of people out and about as we are finally having some nice warm weather here and everyone got cabin fever over the winter and very cold spring (US midwest). But I still don't want her doing the 25 minute walk on her own or even with friends as about half of that time she would be walking through a residential area with virtually nobody out. There is a municipal curfew here that backs me up so I don't have to argue too hard.
DD(16) is my youngest.
With her older siblings (and with her too) I had an arrangement that if they were ever out somewhere and wanted to leave - party getting out of hand, friends had ditched them, friend drunk and needed to be taken out, unpleasant atmosphere developing, crowd of unfamiliar people crashing, designated driver in no fit state to drive, etc. - all they had to do was send a text or call with their location and I would drive anywhere/anytime, park a discreet distance from the location, text to say I was there, take any number of friends with my DC, drive them all to my home, and not ask any questions.
All the DCs observed the rule about answering the phone if I called or texted and I guaranteed I would not pester people. They also called or texted to say plans had changed if that was the case. I always asked them what their arrangements were for getting home before they went out and I asked them to call me before midnight if arrangements fell through and they needed a lift. At that point, pick up time was negotiable, with the default assumption that me being up all night driving was not the preferred option.