I trust that if there were anything truly reassuring to tell shareholders about Unocal’s relationship with the barbaric Taliban regime of Afghanistan, Chairman Roger Beach would have said it at last month’s annual stockholders meeting. Several of us attended to press Unocal to explain how the company can insist that it isn’t “negotiating” with the Taliban when numerous international press reports credit the corporation with underwriting their visits to the United States, welcoming them into their homes, doling out gifts from fax machines to frisbees, and even picking up the tab for the occasional pair of eyeglasses. Outside the meeting, …