Well of course safety is paramount (and talus I am sorry to hear about this incident you speak of) but we don't have to choose between safety and good crag manners. We can promote both, can't we? I'm not sure fliers are a great idea. Maybe posted signs with tips would be better, we could put them up at the crag and at the area gyms.
It's true, I have a blog. http://climbandpunishment.blogspot.com/