Activists took aim at Chevron Corp.'s human rights record Wednesday during the oil company's annual shareholder meeting - and Chief Executive Officer David O'Reilly fired right back...Chevron's shareholders voted down proposals that would have required the company to adopt a comprehensive human rights policy and report on how it decides whether and when to leave troubled countries. Another defeated proposal would have forced Chevron to report on the procedures it uses to assess the adequacy of environmental and health laws in host countries.