What if there was a car coming out of the sideroad on the right and they were looking in the direction they expected oncoming traffic to appear from? Yeah alright you're supposed to stop at the give-way line, but on a straight stretch of road like that a lot of drivers will just inch forward because they don't expect some nutter to be driving up the street on the wrong side. Dude in the BMW was going too fast to have been able to react in time if something like that had happened. It's still dangerous driving even if it passed without further incident.
Saw the opposite of this today - a woman pulling out of a side road to turn right, but only checking that the destination lane was clear. I hit the anchors, the cyclist a few feet ahead of me started screaming and swerving (he was fine, kept going), and old lady in car stopped in the middle of the lane, starts having a minor panic attack and repeating "sorry, sorry". I was a bit concerned that she was going to go into shock. Before I could check that she was OK, some dickhead finds the button for his horn.
Saw the opposite of this today - a woman pulling out of a side road to turn right, but only checking that the destination lane was clear. I hit the anchors, the cyclist a few feet ahead of me started screaming and swerving (he was fine, kept going), and old lady in car stopped in the middle of the lane, starts having a minor panic attack and repeating "sorry, sorry". I was a bit concerned that she was going to go into shock. Before I could check that she was OK, some dickhead finds the button for his horn.