A 45 ACP stuck in ones ear has a tendency to clarify ones thought process on what is right and wrong. A 16 ounce beer bottle exerted with great force against the occipital lobe has a tendency to make ones mind cease functioning for a short period of time or if used with sufficient enthusiasm to cease functioning on a permanent basis.
Personally I am prejudiced to the 45 ACP solution. It seems to keep other criminals waiting their turn pause to evaluate their life expectancy.
Controlled application of force is the sincerest form of communication.
It sure beats those wimpy 9mm's, doesn't it?