Tracking devices on mobile phones are very useful. Mr P and I switch ours on when travelling separately, we like to know the other is travelling safely. Our adult children use it with their family. They can know when one of them has picked up the children or arrived safely somewhere. Their teenage children switch on voluntary when they are out and about to keep them safe. Most youngsters carry a mobile phone and can choose to only switch on location data between friends if they don't want parents keeping an eye on them.
I think we do need to change the drinking culture, as others have said, going out with the intention of 'getting hammered' is not a good thing.
Parents need to educate children about being safe, drinking responsibly and taking responsibility. Where parents are inadequate then teachers, police, clergy, in fact citizens in general should step in. Education, education, education.