Originally Posted By: J. B.
jumping hard on one person will not prevent others from doing the same thing.

Of course it won't in any absolute sense. Some people will be jerks no matter what. However, you are losing the bigger picture, because for many people, seeing the consequences will affect how they choose to act in the future. I agree with Michael's point that significant negative consequences are helpful in cases like this to discourage (cf. eliminate) unwanted behavior.

Basic psychology.

Bears, beets, Battlestar Galactica.