Last Tradhican will refrain from baseless speculation about his opponent (Mark79).
LT claimed that Mark79 was "more likely than not" a non-Catholic. He has ZERO evidence for that wild accusation, aside from his hatred of him. That is not evidence.
On the contrary, the evidence that Mark79 is among the best Catholics on the forum is legion.
There are worse sins than defending, using, or even promoting the use of controlled substances. Please keep that in mind. I'm talking about grave sins against charity, hatred, and sins of the tongue including slander.
Marijuana use -- and I'm talking about recreational smoking of joint(s) until one is AS HIGH AS A KITE -- would be a sin of weakness. It might be mortally sinful, but the wounds it inflicts on the soul (long-term damage) are about the most superficial of all mortal sins. Compare with sins of malice, or diabolical hatred.
At the seminary we learned about the different types of sinner. It's been a while; I wish I had my notes handy.
What I'm saying is, this relatively minor issue in the scheme of things is NOT worth losing one's soul over.
LT, your "ends justifies the means" behavior in your crusade against pot would *only* make sense (humanly speaking) if you had suffered some damage in your private life from marijuana. For example, a career that is not what it should be due to MJ use during youth, or one's wife becoming a user of MJ and then committing adultery and subsequently running off. Those things would cause one to say, "Well, at least I understand why he's so emotional, so invested, so vehement about this issue..."