Maryland Criminal Law Section 3-803

      (a)      A person may not follow another in or about a public place or maliciously engage in a course of conduct that alarms or seriously annoys the other:

            (1)      with the intent to harass, alarm, or annoy the other;

            (2)      after receiving a reasonable warning or request to stop by or on behalf of the other; and

            (3)      without a legal purpose.

      (b)      This section does not apply to a peaceable activity intended to express a political view or provide information to others.

      (c)      A person who violates this section is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 90 days or a fine not exceeding $500 or both.