Educate yourself and your dad....that is what you really need to do.
Knowledge is your best weapon...

from NORML:
Marijuana, like other drugs, is not for kids. There are many activities in our society that we permit adults to do, but forbid children, such as motorcycle riding, skydiving, signing contracts, getting married and drinking alcohol or smoking tobacco. However, we do not condone arresting adults who responsibly engage in these activities in order to dissuade our children from doing so. Nor can we justify arresting adult marijuana smokers on the grounds of sending a message to children. Our expectation and hope for young people is that they grow up to be responsible adults, and our obligation to them is to demonstrate what that means.

http://www.ukcia.org/research/default.php

http://www.norml.org/index.cfm?Group_ID=3418#question6

medical research -----> http://www.csdp.org/kz/mmj.htm