When it becomes apparent that one does not care about my situation, stake and/or feelings, I don't have to care about his/hers. Not that I won't, but that I don't have to. Looks like this is the best course of action when dealing with selfish people. And unfortunately, a lot of people out there, if not most, are selfish.
(This remotely relates to determination and claim of problem ownership, shortsightedness, and selective blindness. I'm too lazy to elaborate on them right now though…. Maybe later in a dedicated TWC post.)