While I was at BSDCan, I had an idea that I shared with @dgoodkin and would like to quote in one of my upcoming talks and/or articles. Many young people aren't familiar with the BSDs, and we could try using a bit of psychology to pique their curiosity.
Something like: "Hey, consider investing some of your time in FreeBSD. Maybe you'll become an adopter or a dev. After all, Windows is (probably) powering your PC at school, while FreeBSD is powering your PlayStation and Netflix. Maybe you can do without Windows, but what would life be without the other two?"
@emilianosandri it is unrelated to the original suggestion, but I found very inspirational this blog post