IMHO all you can do is explain your concerns and talk to her about the dangers of society and as a parent you want to make sure she is alright (by now her eyes are glazed, so a waste of time)!

IMHO and experience you can't lecture a teenager, you just get glazed eyes and a strop, as to me teenage years are fledgling years, changing from a dependent child to an independent adult, but you can set boundaries and get her to understand you. IMO experience the best way is very often using reverse physiology to get them to feel your emotions of anxiety.
For example: You ask her where she is going?
With my friends!
I want you home by 10pm, that so not fair, they are all allowed to stay out to 11 or 12, and Sarah is allowed out to 1am, why can't I?
Because we think at your age 10pm is quite late enough?
Your so old fashioned, it so unfair, why can't I stay out until at least 11pm, I'll only be with my friends from school?
Who are they?
Just my normal friends, that's who, big sigh, can I have names and mobile number? Glazed eyes, big Kevin strop and sigh, you've got mine what more do you want (in her best stroppy voice)!
Reverse physiology then cuts in by asking her how she would feel if she came home and you and your wife wearn't there... (big pause) it was raining you were cold, wet and hungry (pause). You called our mobiles and all she got was our voicemail (pause). You didn't know where we had gone apart from us saying we were going to be with our friends. two hours later, there was still no sign of us as as we were having a really good time, how would you feel (pause)? (probably normal teenage uncertain answer, So)
Then tell her, if we had told you where we were going and given you our friends phone numbers and you had called them and spoken to us, would you have felt much better? This is the only reason why we ask where you are going and who you are going with and in case we can't contact you on your mobile, you can for our reassurance give us your friends mobile number, (big sigh. ok, if you must it is....)
My daughter was a wild child during her teenage years, but it has all turned out for the good as she is a fine adult.
One day, I will tell you more about my daughters, Miss Melissa Marie, teenage strop years. I always tell her I had no grey hairs until I had her, now my head is full of them
