In high-school, I would use students phones to text their parents inappropriate things
Why do that to the students?
I wanted to ruin their relationships with their parents.
You should not be doing that to students. It is wrong to do that as you can get them in trouble.
I didn't realize how bad it was.
It is a good idea to tell the parents that you sent texts that it was not their children talking to them. You need to remedy that situation.