No they're not. The reason he's pedaling when he is going backwards (fakie is what they call it) is to let the rear wheel continue moving. If he didn't pedal, or was pedaling forwards, the rear wheel would want to stop or rotate forwards.
My lil bro is a pro BMXer and he talks about it all the time lol.
To get around this problem you can buy a free coaster hub, which doesn't make the "click-click" sound. It believe these can freely spin backwards.