When visiting a place of worship, or a guest in the company of believers, common decency and good manners dictate you not disrupt the proceedings and insist on publicly declaring your agnosticism. I take off my cap, or if it's a Temple, I put one on, to show respect. When the others pray, I stand and remain quiet, but I do not feel the need to pretend I am participating in church ceremonies and rituals. In fact, to do so would be a lack of respect on my part.

If I am ever asked to lead the others in prayer or benediction, I only hope I've had the time to compose a few nondenominational words suitable to the occasion that do not mislead anyone present as to the nature of my beliefs. But when religious rituals or acts are imposed on a visitor in a secular gathering who is not a believer, especially an official function, as I interpret the intelligence briefing quotes discussed in this thread, I feel it is bad manners and a lack of decency and respect on their part.

Public occasions benefit from a bit of ceremony, and I have no objection to an opening moment of silence or meditation, during which the devout may pray if they wish. I have no objection to the Pledge of Allegiance either, although I wonder why we seeem to be the only country in the world that feels the need for one. But that little "under God" Eisenhower added really pisses me off.