I am an unabashed supporter of making "targeting" a penalty.
Which is controversial; many people have an issue with it being called at all. The reasons for this range from the knee-jerky ("Football is becoming wussified, back in my day we ground our brains into a fine paste incapable of remembering our home addresses and WE LIKED IT") to the more sensical ("Targeting calls are applied in a haphazard and illogical way, and players and coaches and refs seem utterly confused as to what actually warrants an ejection").
The first argument isn't worth addressing, but as for the second?