Every Memorial that I ever attended, all the attendees wore serious or solemn expressions.
For crying out loud, as quoted in the friggin' article, it's supposed to be the commemoration of the death of Christ!
From all the visible faces in the pictutre below, only three appear to not be grinning.
My favorite is the guy who appears to be sleeping (he is the one to the left shoulder of the closest Attendant).
So many stupid people, so few comets! :o)