Legal definition of Treason Treason. A breach of allegiance to one's government, usually committed through levying war against such government or by giving aid or comfort to the enemy. The offense of attempting by overt acts to overthrow the government of the state to which the offender owes allegiance; or of betraying the state into the hands of a foreign power. Treason consists of two elements: adherence to the enemy, and rendering him aid and comfort. Cramer v. U. S., U.S.N.Y., 325 U.S. l, 65 S.Ct. 918, 9327 89 L.Ed. 1441. See 18 U.S.C.A. § 2381. A person can be convicted of treason only on the testimony of two witnesses, or confession in open court. Art. III, Sec. 3, U.S. Constitution. http://adlusa.com/adl//treasdef.htm http://www.house.gov/Constitution/Constitution.html
Depending on how one interprets a breach of allegiance to one's government and adherence to the enemy, and rendering him aid and comfort there is still this little tidbit: ...American free speech does not apply on foreign soil... Dixie Chicks’ treasonous ignorance http://www.ocolly.com/issues/2003_Spring/042503/stories/kurtz.html
Not that I think she should be put to death ;-D but not playing/purchasing their material is a fair statement for anyone to protest their stance.