I sense another great line of "training" DVDs from the cow...
Of course, I had read with enthusiam the thread from which this was "inspired". Just a few minutes ago, I listened to a client chew someone out for late ads when this person is directly responsible for the "lateness" at which we get all the elements to go to press FOR... ah deep breath... Besides timeliness, accuracy, fair play, creative allowances etc... any thing you'd want in your "training clients" DVD? (targets painted on their shirts?)
More seriously, my biggest problem with clients for a while now has been an over-reliance on powerpoint as not only their source of graphics, but their "script", derived from the "speaker's notes" part of PPT. It's really the exact reverse of the ideal situation; you want to create the best script you can first.
Not a day goes by here in the shop where the editors aren't going nuts trying to find or create b-roll elements to cover what the client put in the script as narration. So I would say: clients, understand that it costs more in time and work to create or re-create elements you never shot in the first place.
Totally empathize with the problem of creating B-roll elements due to lazy clients.
On the other hand... "graphics creation" has become a lucrative add-on to the editing assignment.
Now that the clients know we can make something out of nothing (moving on stills, creating graphics in Photoshop and animating them in After Effects), the only incentive for the clients to write to the material is paying the editor for the time it takes. It can go so far that the editor becomes a sort of producer.