If you are young and you are thinking to do an acount in a social webside like tuenti facebook ot twiter take care and I recommed you to imform about this before doing nothing. To help you creating an acount I am writing this text because I think is very important to know more about this.
But in facebook isn't all positive because like in all the websites the things you publish in there are going to be there for ever. So you have to be carefull with that.
As a conclussion I can say that most of the social websides could be positive with a good use so I recomend you to find information about this and to think twice before doing anythng.
For helpping you I have putten here some interesting videos: