Interesting comment. What's also interesting is that oil tanker traffic will increase total port traffic by a mere 3% but environmentalists don't seem to concerned about that traffic and your concerns noted above should really be addressed to all the 'other' traffic. 

Additionally, all oil spills at the the Vancouver port have come from non oil-related shipping. Who pays for those spills?

Based on your concerns, you should be calling for a complete shutdown of the port of Vancouver.