Duh. Still, I was intrigued by the way they framed the question:

The majority of British Columbians think the legalization of marijuana would reduce violence related to the drug trade, an Angus Reid Strategies poll suggests.

Sixty-five per cent of the respondents would legalize marijuana in order to minimize violence, while 35 per cent think harsher penalties for marijuana trafficking are the answer. [Vancouver Sun]

This question could be criticized for putting words in the respondents' mouths. Still, it's notable that, given a choice, so many opted to conclude that violence is a consequence of prohibition. Once that concept is understood, the whole idea of a war on drugs pretty much falls apart.