Why not, because it's against the law? People from all walks of life abuse drugs, why would mob guys be any different?
Because it doesn't seem the kind of conduct that would befit a Boss. A Boss should be in control of himself at all times. Coke, H, that's skeevy degenerate shit. What kind of message does it send to the guys below? You have to lead by example. Especially Ton was doing coke RIGHT BEFORE a meeting with Phil Leotardo and other NY guys.
About the Heroin, yeah I agree it is a degenerate drug and I've never seen anyone succesfull using it, maybe they were but the H makes them fucked up in short time. But cocaine is considered a high class drug and pretty expensive too. A lot of people who are wealthy are using coke, I've seen even people using it working in good paid jobs in offices and there's been politicians snorting coke as well. Another thing is the effect you get, you can think better, feel more confident about yourself, have something like a power boost - it comes if you use it rarely, not every day. If you coke your brain out every day then you'll be a retard and paranoid a lot.
The all Omerta code and guidelines that the media and officials provide us is just a show off for any criminal organization there is in this world. First, they need to show that crime is bad and how bad are the criminals and how organized and tight they are, to get the usual citizen scared. When they take them down then the cops/FBI can take the credit of what kind of a good job they did. The reality is really far from that. Just look at the examples - how many guys have snitched? Doesn't the code of their organization say to them that they shouldn't snitch?
You see, all these guys are criminals or people who are used to break and bend the law and rules wherever and whenever they can use it for their own good. Such as the mafia had the rule for their members to not get involved with another members wife/girlfriend. But a lot of them did? Such as Henry Hill's wife had an affair with Paul Vario who was a captain. Then again all the betrayals between all of them, someone wants to become the boss and they just kill the current one. Or like James Burke after the Lufhtansa heist, he never shared a cut with many of the involved in that heist but it was better for him to just execute them. So it is not miracle that any member of the mafia or even the top man - the boss will break or bend some rule of the mafia in his own favor. And snorting a little bit of coke rarely isn't the worst thing any of them is doing.
