Hmmm. I was only raised a former Catholic, but I seem to remember wine being ritually sipped, not consumed in sufficient quantities to make blood-alcohol content higher than the legal limit. Granted, everyone's blood-alcohol tolerance is different, but I'd believe the legal limits we have are chosen using scientific evidence. Plus, the procedure we have -- stopping only specific people who appear to be impaired, with exceptions made for New Years Eve in a big city or $hourWhenTheBarsClose in a college town on a Friday night -- seems unlikely to harm anyone using common sense.

Speaking from the other side, as a member of religion/s which endorse both ceremonial and social alcohol consumption, I generally make the same choices in either case: consume token ceremonial amounts myself, have a designated driver, call a friend/cab, wait for a bus, or when all else fails hang around chatting with a bigass glass of water for a couple hours. Seems like any of those would work. It's sad how much religion and common sense diverge nowadays.