If someone owned a cleric's collar, a black blazer and slacks, and a gold crucifix, was well known as a former Jw in the local congregation, wouldn't it be great fun to show up at the Memorial looking rather 'man of the cloth'? A large Bible with a nicely embossed cross on the cover would complete the ensemble.
One could stand at the back of the Hall, hands behind his back, and just quietly saying 'Hmmm' throughout the service. The occasional chuckle could be quieted with a cough to cover and a hidden smile for any who dared take a look. When the moment of truth came, he could eat and drink heartily from the unleavened offerings, then cross himself with appropriate piety.
To add even more fuel for the gossip-train, he could have his crucifix mounted on a rather gaudy yin-yang oblisk, and have the collar decorated with a tasteful golden Buddha pin. If this fellow got a little spirit and began to speak in tongues right at the end or during the prayer [respectfully of course], this Memorial could be the best-remembered of all for the entire congregation. It might even make an assembly discussion or two.
Jeff