I feel like an AA but, however, we wrap our bottles in whatever in our checked baggage and have had not encountered a problem. Hawaii (08 Zaandam) was a different situation in that there was an outside security checkpoint and once you passed that, you were "home free". We could go to any ABC store at the pier and purchase whatever and there was never any question. Have to say that HAL onboard drinks are not prohibitive and happy hours were generous. But, on the Eurodam, happy hours were from 5-6 PM which was early for us. Once we discovered the time differential, we just adjusted our happy hour. On the Noordam in November 09, happy hours were from 7-8 which was more reasonable for us.
I am fearful that if we continue this discussion, we will encounter more limitations on the various lines. Be careful what you wish for, it may come true.