Yeah you dont have to belt anyone or tell them which way the wind blows they wont listen,and smacking someone just makes you feel like crap later.
But if they come to you,tell them how you feel about it and them by all means.
My labourer went from looking like a dead ringer for a light heavyweight version of Cotto down to a gaunt haunted looking dude that just chews and grinds his teeth consistantly.
(he is into everything except for Horse, Lyle.)
I had to tell him,"Mate I love you like a brother,I really do and this is fukkin killing me watchin you do this to yourself" I cant finance your death,I've buried to many of my mates already so please don't ask me to ok.