This isn't the first time this has happened. The last time the Nucks made it to the finals they lost in 7 to the Rangers and they rioted just the same. When the Habs won the cup back in 93 there were riots in Montreal too.
To be fair though, most of those twats were probably just asshole looking to fuck shit up and not actual Canucks fans. Though, I've gotta say, Vancouver is the only city I've ever seen riot because they lost.