It can depend on where and why the person is using the title. A title cannot be used to deceive others into believing something that is false. A lawyer cannot go into a hospital stating he is a doctor, for example, if a patient in the hospital is led to believe the lawyer is a medical doctor.Most people don't put the initials of their degree after their name (doctors excepted). But they CAN. To suggest that those who have earned one specific degree are barred from doing so because MAYBE someone might make an assumption about their profession is ludicrous.