I used to just politely ignore these things, but now I think I would enjoy making a scene.
Not that I would have a chance. Unless I am absolutely sure a parish is orthodox, I never darken an ECUSA parish's doors. I don't want to be near when the fire and brimstone rains down.
I was going to make a mildly sarcastic comment..but when I saw the poster, I realised there is no hope. I just smiled, shook his hand, and left..