Those who are okay with weed/want it to be legalized...

Do you think some people are bad parents for letting their kids (16+) smoke weed? 
My parents have never outwardly said okay to it, but I've told them and they don't tell me I can't do it. 
I hardly smoke it, and when I do, I do it in a safe place with trusted people, and I'm almost 18 
I should mention, they don't give it to me and I don't smoke in their house