You make up a password while in the process of registering you account .
I would classify MySpace to be in the entertainment industry. MySpace allows people to listen to music, view videos, flirt with people, and has addicted the masses at large.
As found in their Terms: Accounts can be deactivated by using the Contact form and submitting the account name, email address used to register the account, and the current password for the account. It is recommended that prior to requesting deactivation that the password be changed into something simple and impersonal.
I think they are making it where people can cancel their own accounts, though.
Well, basically because most brazillians are talkative people, love gossiping, and always have things to tell. It's also a way to find people you like, your friends and family and talk to them, and also find people you don't see a long time. Brazilian people like talking and found in the internet a good tool for what they like to do. That also why Brazil has the biggest number of MSN active users in the world