For example creon from the play antigone, he puts fear in others by having a temper. Also when heh says in the play that if you try to pay any sort of respects to the dead traidor polyneices that he will have you stoned to death or starved to death. This shows how people in power can have a negative effect on others. This also shows how this can make people concern on what the leader will do next.
Another example of a leader that uses his power negatively is kim jong un, the leader of north korea. For example when kim constantly talks about how he