Job applicants asked to provide their passwords to social networking sites

As part of routine background checks, the city asks job applicants to provide their usernames and passwords for their social-networking sites. And it has been doing it for years... City officials maintain the policy is necessary to ensure employees' integrity and protect the public's trust, but the American Civil Liberties Union of Montana says they may be crossing the line.... [MAY be crossing the line? MAY BE????!!!!!]