Opinions are like faces, we all have one and there's nothing you can do about it. Almost every day I read about people criticizing The Bee for publishing something they don't agree with, saying it shouldn't be printed.
This is an extremely controversial world, and if you can't deal with it, you need to live a quiet, lonely, unopinionated life under a rock! So have your derogatory remarks about others' thoughts, but keep it to yourself if it's so negative.
By the way, if you don't need marijuana, don't worry about it. It definitely does not cause harm, so find something more reasonably dangerous to rag on.