

- Yes
- Generally yes, but it depends. If I feel like my intervention can actually be useful, sure. For example, if anybody in my acquaintances would be doing that or be a victim of that. “Intervene” also would most likely be reporting or providing shelter, I am not Batman.
Note that both the answers are independent on whether the stalker is a man or not.
Oh, I guess different school systems, so that didn’t even come to mind to me. At least in my country high school is from 15 to 19, I think lots of people thankfully mature and change after teenage years.