Yeah. When I was 12, I visited my 10-year-old cousin, and she had a brand new "witchcraft" book, (in retrospect, it was probably watered-down Wicca) which contained a rune chart. As far as I've been able to figure out, they're a modified version of the Futhark runes.

Anyway, when I got back home, I taught it to some friends, and we passed notes to each other in runes. I've actually got quite a bit of writing (stories, notes, calendars) entirely written in runes. Thankfully, I can still (mostly) understand it.