But you're still kind of a bad friend if you don't try to stop them from doing stupid stuff
I have friends who smoke weed, which is illegal in my state. As a "good friend" is it my responsibility to try and stop them from smoking weed? No, not really, I don't care that they smoke weed and they can do whatever they want. Just because you're friends with someone doesn't mean you're obliged to care what they do. Honestly if you are going out of your way to try and maintain law and order and stop your friends wrongdoings, you yourself sound like a bad friend and they'd probably stop being your friend for doing that stuff.