It means I'm a stakeholder. Once I have kids, then I'll be even more of a stakeholder.
Like it or not, your job as an educator extends beyond the subject you teach. Kids need to learn character as well. Since you have them for 8 hours a day, teaching that is partly your job.
I'm not saying you should have hall monitors, or that students are primarily responsible for the safety of other students. That responsibility does fall first on the educators. However, you and I both know that you can't be everywhere all the time. There will be times when a kid sees something going on that he knows is wrong, and there won't be anyone else around.
That's when a kid must develop character.