Dude... do something worthwhile with yourself instead of playing all these games all the way through, one at a time.
If that's what he enjoys I don't think anyone has a right to tell him to do something worthwhile. Apparently if he's having fun, it's worthwhile to him?
Also, I do have a Super Scope laying in my closet yet for the few games that used it, sure it weighs like 10lbs and sure it looks like a bazooka, but dang is it fun.