Although I believe that the moral obligation would be to withdraw from the parade altogether, human nature dictates otherwise where oppressed minorities are finally given access to previously forbidden privileges.

However, it would be appropriate for band members to wear a black arm band in protest to Rick Warren - the man who believes that our marriage rights are synonymous with bestiality and paedophilia, and abortion and the rights of all women to their own bodies

Moreover, the blackout of Bishop Gene Robinson by the Obama Pre-Inaugural Committee (according to HBO) and the audio visual identification of the DC Gay Men's Choir suggests that you would remain silent and merely march in front of the Presidential Reviewing Stand, and then resume playing.