I might seem like an asshole but w/e. I say if your grades and stuff arent being affected just keep doing it.and next time they catch you argue with them about how nobody's even died from it,and it shouldn't matter that your smoking if you do it responsibley,just like adults drink responsibley.Just respect them enough so that it doesn't smell or they're friends don't know about it and It doesn't interfear with they're lives whatsoever.(sorry about the spelling ,I'm pretty hungover right now and can't spell lol)