I'm never afraid of an education. I'm off to picket my local traffic lights. Rothbard and, much less well-known, Mises, were against open borders. As a libertarian, I resent your slandering us with your statement that we see traffic signals as government coercion. That is an absurdity.
Libertarians have nothing against orderly traffic and rules of the road.
Although we believe that private corporations would run the roadways much better than the government does, if such private ownership was allowed, we do not support unsafe roads or promote traffic accidents. Open borders would create so much pressure on the welfare state that the welfare state would quickly collapse, economically and politically. Support for government welfare would quickly evaporate. Open immigration will quickly lead to the end of the welfare state. Not just welfare would be ended by open immigration.