I generally don't tell anyone what's right or wrong exactly. If something bothers me, I try to relay another point of view/food for thought, illustrate something or some experience that shows what x or y action leads to, and then just sort of let them take it or leave it. If it's something wrong I see that might lead to immediate danger, I do something about it and talk later. I rarely see any of it work though. It's rare if someone actually takes my advice.. for some reason, I don't inspire :X More like, the guy they come back to months later and say "you were right".