Seconded. And this doesn't mean you have to leave the passing lane. If you're actively passing people in the second lane, you can be in the passing lane as long as you want. If someone tries to go around you on the right, they're the asshole. However, if there's no one to your right and someone catches up behind you in the passing lane, move the fuck over (though again, if you catch up to someone, give them a second to do so). It's basic fucking courtesy.