A comment by Pezhman.

There are many ways to make people (including friends, employee, students, children and ...) think and act as we want.

Among all those methods, frightening others was known earlier, utilized more frequently and more worldwide (even today). Unfortunately it works, though we all know there is no good in that.

I can not think of anything more terrifying than the moment somebody notices the world is diffrent from what she/he imagines. That is why some try to control others and some give control of their lives to others.

A friend whom I highly acknowledge, says that there is a great joy in the moment children say "NO" to their parents. That is the moment they grow up!