It's basically just there to dissuade casual pickpocket/theft. Like if you're traveling by rail and have your briefcase overhead and are snoozing, someone coul

It's basically just there to dissuade casual pickpocket/theft. Like if you're traveling by rail and have your briefcase overhead and are snoozing, someone could just open it, take your laptop and disappear. That's about the sum total of cases it's preventing. Not terribly useful, no.