I have often heard the argument in the coptic church that the bible forbids alcohol and that everytime wine is mentioned in a favourable light, it is actually talking about grape juice (abarka). This seems like a very willy-nilly baseless argument.
They argue that the 'proof' is that at the wedding of canaa, the wine that jesus made was non alcoholic and that's why the groom noticed a difference. This is an even worse argument because if someone is somewhat drunk, the only thing they would notice is an alcoholic drink that's even stronger.
I have a feeling that the reason the coptic church is so vehemently opposed to alcohol is more cultural than religious. Alcohol is not a big deal in the other orthodox churches. What do you think?