I find this mindset has served me well in adult life as well. Funny story, a few days ago I was at a dinner party and someone jokingly threatened me with a case knife. I immediately drew my knife and fork into "combat positions" without even thinking, which drew a "just kidding man" response and respect for the rest of the night.
Some people think they can act like we live in a totally "civil society" in some sort of "pretend you're in the world you dream of" practice, but it ignores the reality that there are bad actors in this world that will take advantage of that. Some times you just have to stand up for yourself, legally of course.
Respect or fear? Dude, all I know about you is that comment and I don't want to have anything to do with you. I'm sure you're a great person and all, but....
Out of curiosity, while we're discussing escalation, at what point do you start being a "bad actor"?
Also, "kids" are not to my knowledge generally put into such situations in "prison", although I'm sure it does happen.
And, yeah, I do identify with Ender quite a bit.