You outline one of my problems with libertarians. And I am one , sort of. You dont want something to be illegal so you condone it and excuse it, hoping that the momentum caused by the non-enforcement that you helped create in the first place makes some prohibition unrealistic instead of working to change law. That bugs the hell out of me.
oh That and you want to open the borders before we limit government, axe the welfare state, and secure property rights in this country. Until we do that, allowing huge immigration and naturalisation from the left wing south will move this country to the left. Not good.