I was quite hesitant to jump on this at first, as technically he is not doing anything wrong per se.
BUT, then the scriptures at 1 Cor 8 and Romans 14 came to mind:
"If eating meat or anything else causes my brother to stumble, I will not do it...so as to not make my brother stumble" etc
SO, surely he lacked wisdom in choosing to buy so many bottles all at once in such an odd way? He removed them from their individual gift boxes, which may mean they are not a gift for others, and he really seemed to know his product when asked.
So, even though it isnt wrong to buy and consume alcohol, was it the wisest thing for the annointed of Jehovah - christ's brother, to do?