They're not cocking it up though, they're using an open lane. If everyone did it, then everyone would get there much quicker. The fact that people will sit and queue means that it's their own fault they're not getting to their destination sooner.
That said, there's a difference between pootling down a lane of traffic and flying up at Warp 10, slamming the brakes on at the last minute. One is okay, one is just stupid.