In a non-public forum the government has greater regulatory powers over speech. Bonowitz v. United States, 741 A.2d 18, 22 (D.C.1999). 'The government can regulate speech [there] `as long as the restrictions are reasonable and not an effort to suppress expression merely because public officials oppose the speaker's view.'' Id. at 21 (quoting Cornelius v. NAACP Legal Def. & Educ. Fund, 473 U.S. 788, 802, 105 S.Ct. 3439, 87 L.Ed.2d 567 (1985)).