Even if someone were to shame you, what's to stop you from ignoring them? So what if other people have opinions about your behavior; just acknowledge them and move on.
It's more the almost overwhelming temptation - the need, even - to consume alcohol.
It's not an issue I face, as I'm not an alcoholic, but I'm sympathetic to those who do suffer from this disease and face a less than equal footing in their professional lives as a result. I don't have a solution for the problem.
(Aside from the fact that humans are social animals wired to experience discomfort when snubbed. "Grow a thicker skin" is sometimes necessary, but it shouldn't have to be the default.)