I really didn't mean for it to be that complicated.
If I had more room in the subject line, I would have put "Can a person who calls themselves a Buddhist drink alcohol in moderation?" If one chooses to undertake the 5 precepts, can they still drink alcohol in moderation? That's all I was wondering.
Okay, so somebody on one had chooses to makes the statement "I undertake the training to refrain from alcohol and intoxicating substances leading to negligence", but "can they drink alcohol in moderation"?
The precept is not "I undertake the training to refrain from becoming intoxicated", but "... to refrain from intoxicating substances".
They "can" do whatever they like, and "call" themselves whatever they like, but personally I would say that they are saying one thing, and doing something else, thus being either very deluded, a hypocrit or a liar.
If they didn't take that precept, I'd still personally say that they are a little foolish, but at least they wouldn't be saying one thing and doing another. I really have a strong dislike for hypocrisy.