Good discussion all!
I'll add my point to how to stop your friend... make him suffer worse, give him the pain so he can gain. I've never had somebody take drugs in front of me that I didn't agree with. I know coke is bad, I hate the ****, my friends hate the ****, I'm not friends anymore with people who openly tell me they still do the ****.
Every time a new stupid ass tells me they want to do it, I tell them straight up don't make me suffer by me watching you do the stuff. I know it's people that influence them into doing it, and I tell them it's their friends that are telling them to be ****ed up, they've heard all the warnings, and of course they still don't understand them.
For the guys that said it's harder to quit cigs than coke, haven't heard of the term cold turkey, and I'm guessing they don't know ANYBODY that has ever quit smoking. I'm guessing that you also live in a closet, or you lie about things to yourself, that you know to be true.
My solution, to make my friends quit, is to trick them. I tell them what I'm going to do, I tell my friends around me what I'm going to do,I don't LIE to anybody anymore, especially not about something so serious, sure it's fun in the start, and you don't notice the problems right away, I say. Than I immediately tell them, I will ram their face into the coke if they ever do it in front of me, I tell them I don't care if you kick my ass, or get some friends to kick my ass, I'll be happy to lose somebody who doesn't want to be a true friend. Brutal honesty, it's my ****ing life now, I'm just having trouble being NICE to people for no ****ing reason. So I invite my friend over to my place, I want to see him doing some coke a few days later, and I invite the other friends that were there listening to us. Yeah it was dangerous, and I loved the rush of knowing what I was going to do. When he pulled it out, I told him I hate seeing him do this, I told him I loved him, and I'm sorry for anything I'm going to do. The stupid ****s never see it coming, even though I told them what I was going to do. The get there nose lined up with the dust, and I slap the tube away, and ram their face into the table, everybody gets shocked and angry, and I usually have to leave, I never really learned a lesson from it. My friends came back to me, after they stopped hurting me though, they had oneitis for the drug, and I used physical force to stop my own suffering from seeing my friend suffer.
Wish I could say it in a fun and nice way that wasn't dangerous, but it is a dangerous drug.