This might have been in another idea, but I can't locate it.
Would be great to have the "are you sure you want to enroll everyone" message to be bright red and a large exclamation mark. At least make it look a bit different from "are you sure you want to make this available in the catalog to everyone" screen.
Once again, I just about enrolled everyone into a course that I did not mean to do. Whew....glad I caught my error before I hit SAVE.