However, the US Military IS a VOLUNTEER force. Furthermore, you DO give up some rights to serve.
Take a look at the "antiquated" UCMJ and you'll find other examples dealing with sodomy, Conduct unbecoming an officer and a gentleman, Disrespect toward superior commissioned officer, etc., that Liberals would LOVE to ditch.
Here's an example from a week ago, not part of the UCMJ, but a Clinton-era policy:
Supreme Court Turns Down Challenge to 'Don't Ask, Don't Tell'
The high court says that it will not hear an appeal from former Army Capt. James Pietrangelo II, who was dismissed under the military's "don't ask, don't tell" policy.The federal appeals court in Boston earlier threw out a lawsuit filed by Pietrangelo and 11 other veterans. He was the only member of that group who asked the high court to rule that the Clinton-era policy is unconstitutional.
In court papers, the administration said the appeals court ruled correctly in this case when it found that "don't ask, don't tell" is "rationally related to the government's legitimate interest in military discipline and cohesion." ...
Split tongues, nose rings and facial tattoos are forbidden, too ... yet are forms of "Free Speech", in theory protected by the First Amendment.
... sorry ...