Sneaking Alcohol onto a cruise ship

First off, this isn't a continuation on the debate about whether it's right to sneak alcohol onto a cruise ship or not. That debate's been done several times in the past and I don't think either side are ever going to agree with each other.
From my point of view I can see two main reasons for bringing alcohol onboard yourself. Firstly, you fancy a quite drink in your cabin before you go out or as a night cap without having to wait for room service or walk all the way to a bar yourself. The second reason is that you have decided the cruise lines prices for drinks are too expensive so you bring your own booze to get drunk in your cabin before going out for the evening.

Should I stay or should I go?

If I cruise there may be trouble, but if I stay will it be double?

So, you’ve never cruised before, you’ve always toyed with the idea but always thought it might be too expensive, or that you were too young. Your friends finally talk you into it, then you go and watch Titanic again and Leanardo DiCaprio persuades you not too. What should you do?

The following is a short summary of some of the major pros and cons of cruising. I have tried to be as honest as I can, but obviously I’m biased as I love to cruise so feel free to comment and disagree with me or even to add something you feel I’ve missed.