The State Department is facing harsh criticism after it announced that anyone applying for an F, M, or J nonimmigrant visa will need to disclose all social media profiles from the last five years, requiring that all applicants set their posts to public so they can be properly vetted by its agents.

The agency said the new rules are part of a new screening process aimed at identifying individuals who may pose a threat to U.S. national security. According to the department, failure to comply could result in a denial, and consular officers have been instructed to flag signs of “hostility” toward the U.S.—though the criteria for such determinations remain vague.