Recall the response from the American Sniper to the reporter who asked "What do you feel when you kill someone (terrorists) with your Sniper Rifle."
His answer? "Recoil."
I don't advocate actively running these idiots down; but there are natural consequences to jumping in front of a moving vehicle, whether it might be a Mercedes or an armored bulldozer.
Those people who do pull these stunts are the same people who would rather swerve head on into an oak tree trunk rather than run over the squirrel running across the road.
They think everyone has that mentality.
Either that or they believe their numbers will protect them from the front wheel.