Everyone should try weed at least once. Then the causal or selection pathways become obvious. Loads of ridiculous misconceptions over a plant used for spiritual purposes for centuries.
The problem is the smell. It was better discreet, but for that reason only.
Neat! A new review on the relationship between smoking weed and violence!
TL;DR: Weed smokers are 2x as likely to be violent criminals & ~50% more likely to be victims of violence
But selection matters: longitudinally, use is only slightly related to the odds of hurting people