You may remember this one, ATHF meets 9/11. First amendment rights issue?
http://www.boston.com/news/local/massachusetts/articles/2008/02/01/woman_charged_with_wearing_fake_bomb_says_device_was_free_speech/
http://www.boston.com/news/local/massachusetts/articles/2008/02/01/woman_charged_with_wearing_fake_bomb_says_device_was_free_speech/