I also got a great slide last week for the powerpoints on this subject.  I was inspecting a large theatrical company who said they had updated all their SDS books.  When I went into the first shop and opened the SDS binder, I saw that someone had laboriously gone through all those MSDSs and carefully blacked out the word "Material" and the "M" in MSDS.    The title page is a great slide for how not to do this.