I don't know the date of the link that was posted, but it's two way traffic - soldiers into classrooms, and kids into military cadets.
In moderation, I don't think the idea is totally out of order. When it's being proposed by a nutjob stary-eyed loon to the right of Genghis Khan, it scares the shit out of me.
I've worked with ex-soldiers, and quite a few of them were great characters, very interesting, and very good at communicating things, in a "this is the naughty end. We do not point this end at people we like, do we, boys?" kind of way.
But would I want them responsible for the emotional and pastoral well-being of my kids?
Hmm, not really.