If you have any relatives or friends that live overseas say that you want to keep in touch with them, or something like that, and if he does let you get one but still isn't fully convinced show him the privacy settings. I did that with my parents and now they are fine with me having Facebook.. hope that helps :)
say if you get a facebook, you wont do drugs.
Depends on your your dad's mood probably
convince herif it doesn't work convince your dad
answer try and force him or convince him
get a job and but with your own money
Delete his Facebook.
Prove that you are responsible, and can take care of it.
Anal.
be nice to them and persuade them, ask them.
Tell him that you will take care of it and viola!
you can't. maybe he is happy the way he is.
No need 2. Twitter is useless.