People who didn't know me as a drunk don't care if I drink or not and why. Like LBrain said in his parable, the only people that cared were those who knew me before I sobered up. And for the most part you could divide that group of people into two subgroups...those who wished I still drank and those who were glad I no longer drank. Even the people that didn't fit into one of those subgroups probably could figure out why I didn't drink anymore if they had known me long enough.
But I know what you are talking about VDGS, especially in the early stages of my sobriety. Eventually the only people who questioned my sobriety were my old drinking buddies, and eventually I stopped hanging around them if our relationship mostly revolved around alcohol/drugs.