Fratenity! Good or Bad?

In this world there are many organization about a person can be powerful at a school or they may say that they are "ASTIGS" and I don't understand way people join this hilarious activity. Other fraternity do their what we call hazing so that we/they can join their organization . I notice that after that kind of sacrifice we get a ought in our mind that its takes responsibility that a life time we do. So why other person do this and why we do this ?