To help Sheik out, very few potheads beat their wives, commit vehicular manslaughter, get into drunken brawls, or end up costing millions to tax payers via rehab.
One vice is a bad as another. To argue any further is useless.
To support this point you are making. First, I dont do pot, and never have, but I annually go to a Reggae festival thats basically pot central, so been around alot of pot smokers. And I'll mention a basic difference between a festival with pot smokers and other music festivals I been to or heard of, who are frequented by drinkers (plus other drugs, but mainly alcohol consumption). The reggae festival is basically as mellow and non aggressive/violent as you can get, while these other music festivals are ripe with violent beatings, rapes and anything else fucked up you can come up with. And from personal experience to talking to security guard friends, they all agree its basically alcohol (and some heavy drugs) as main influence. That they rather police reggae festivals, because besides the usual petty thugs, its pretty cordial inviroment.
Though guess which one gets 200% police presence and harrassment? The reggae one, because they cant get over the pot part of it, and exaggerate heavily every year.