I understand what you are saying, but again, this was never really an issue until players started do all these swim move head first slides or where they try and slide as far from the player receiving the ball as possible.
I mean, it makes sense to do what they are doing, but it comes with the threat of coming off the bag. Every advantage should come with a disadvantage.
Now, if a guy goes directly into a bag and bounces off for a split second as he goes over, then I would agree that would be ticky tack.