[quote=@Mammalia]
<Snipped quote by souleaterfan320>

"When I say to a wicked person, 'You will surely die,' and you do not warn them or speak out to dissuade them from their evil ways in order to save their life, that wicked person will die for their sin, and I will hold you accountable for their blood." Ezekiel 3:18.

To do knowingly anything that hurts the body, the temple of the Holy Spirit (even if it's not quite that just yet), is a sin. If we allow people to continue in their sin unchecked, the consequences of their sin are on our heads, not just theirs. Christians simply cannot be neutral on it.

No, it's not in concentrated amounts that the effect happens. "One major research study reported that a single cannabis joint could cause as much damage to the lungs as up to five regular cigarettes smoked one after another." Marijuana also exacerbates depression, anxiety, and suicidal thoughts.
[/quote]

So warn them then shut the fuck up. If they aren't christians then you don't get to claim anything about their body being anyone's but their own.

You're entirely wrong. That statement has been disproved, and it can potentially make them worse, yes, but it can also, more commonly might I add, help with those problems.