Surprised I even need to do this. It's self evident to IQ > 1.
Lets look at alcohol. Alcohol, like weed, makes people less incontrol of their emotions and actions. You can argue about the degree but this statement is a fact. Under this state of lesser control people are more likely to do things they would otherwise not. This is expected, they do not feel like they otherwise would. These things are frequently more dangerous. This is why on a night out, one will experience more fighting and accidents than at other times in the same areas. The occurrences are alcohol induced. Weed is the same in this respect.
Further, due to the widespread unlawfulness of producing and consuming marijuana there is even greater danger regarding the substance. The sorts of people willing to risk it's large scale production and distribution are not the people one would wish to dine with. These people will be more violent. Once you've broken the law once to produce your good why not break further laws to ensure you get your money.
I hope this is simple enough for you, it was sure as anything boring to write. It also adds little to the thread as its going to be tl;dr.
OT: I don't understand why someone would wish to smoke marijuana if they came from a good home with adequate income. I can understand it if your poor and therefore depressed with little else to do but 'get high'. If you have a nice home though, I don't get it.
