If offensive hockey is about timing, the puck-carrier keeps the beat. So when you see a team go offside, it’s like the drummer decided to do a fancy-pants solo in the middle of the song only to drop his sticks. The band stops playing, starts glaring, and there are stern words before the encore. So yes, it’s almost completely the puck-carrier’s fault. Unless of course the defenseman made a play, in which case it’s still the puck-carrier’s fault for being so sloppy with the puck to allow this calamity to happen.