why would it possibly be taboo? If the religioon means nothing to you then nothing you do in it can be sacrilegious unless you're deliberately doing it to offend others in which case, it's still not taboo but it's a bit of a dick move... the religious nature of the building is a little irrelevant since the meaning of a 'church' comes from its followers... and if there WAS some kind of Omnipotent, Omnibenevolent and Omniscent force which people worship... I think they might not give a crap, either... because why would they?