well your right Mr 60yr old man, but...
unfortunatley, theres a thing called polite. which gets nicley in the way of us "none believers" i would rather just pretend to go with the flow, rather than play the odd one out. its easier, and no one likes to be the odd one out. (ask any child, they know all about that!)
although...having said that...
i remember going to a catholic 6th form college. and when we had assembly, even though i told them im strictly NOT religious in any way shape or form, they still tried to make me attend mass. (it is called mass isnt it?) anyways, one time, me and a load of friends even tried to leg it out of the hall, can you believe the teachers tried to stop us!?
I have to say though, that the running-away-from-mass senario is entirley different from the dinner-table-saying-grace senario. firstly, i was immature then, and secondly, im more mature now (...i think...) and i would hate it, but id feel more comfortable at a dinner table pretending.
the only places i dont like are churchs, honestly...they give me the creeps...