My father doesnt let me to install yahoo messenger & chat.but iwant to do.i am 15.what do i have to do?HELP!?

Your Father is correct. The Chat rooms are full of people that want to take advantage of your youth and your innocence. Also, the chat rooms are full of 'BOTS' which are automated programs that insert ographic content into the chat rooms attempting to lure people to follow links from their 'personal page' to ographic ual oriented sites. Nobody should have to be exposed to this type of material...especially a Young Lady. Listen to your Father. He has your best interests at heart.