The 'our world' version of disemvoweling was invented (well, at least with that name) by Teresa Nielsen-Hayden, as part of her moderation strategy for her (and her husband's, and various other people's) blog with high comment traffic.

Much more cool info here: http://en.wikipedia.org/wiki/Disemvoweling

I love it because it's almost readable, but you have to really want to. (And I think it's a *fabulous* hex.)