Some people are pathologically incapable of imagining the consequences of things that happen around them. You can tell them all about global warming, or drug-resistant bacteria, or NSA breaking every law imaginable. They don't care. Because right now none of that bites them in the ass, and they are incapable of imagining what will (inevitably) happen when it does.
PSN being hacked didn't teach them anything about centralized gaming services.
Sim City 5 didn't teach them anything about DRM.
Target breach didn't make them aware of the deficiencies in the credit card system.
Trying to reason with oblivious people who don't give a damn about anything beyond their immediate gratification is largely a waste of time. To them, everything is a matter of definition, everything they don't like is subjective and requires infinite amount of proof.
However, what you can do is state you position. No amount of fanboy crap can shake that.
Here is my position. I will not buy this game in any format that requires connecting to Steam.
If there is a Steam-free boxed version that can offer me that, I will gladly buy it. It sounds like D:OS is the kind of game that would justify acquiring collector's edition.
If there is no such boxed version, I will wait for GOG.
