Stephen,
This makes sense in a lot of ways. Once when I tried this, the lower achievers complained they were denied the points and claimed I was unfair with my grading. Explaining my rationale and justifying my actions did little to alter their gripes. I've since learned that any opportunities for EC, bonus points, or adjustment opportunities must be given to all students. I understand different classes will have different purposes, and EC may be more appropriate in some classes, more so than in others.
Barry Westling