Exactly. Using other people that are successful and smoke pot is a good rebuttle. Try and be smart and out smart her by using real evidence, not fairy tales.
Obama smoked pot,Bush did pot and coke,(probably not a good example.lol) Virtually every actor,actress or musician has smoked. Ther are a lot of rich people that have. Just google and see what you come up with. Print it out and have an honest debate with your parents, and remain calm the whole time. There's no proof that pot does anything negative except for societies twisted laws about cannabis. And when you debate don't use the word pot or weed, use cannabis. It sounds more medical and has less bad connotations than the other words.
Every kid that feels positive about pot should take a debate class in school, so you can articulate your feelings on the issue should it ever come up.