Can we stop saying "anti consumer" when we actually mean "bad value proposition"?
Anti consumer implies that a company is misleading, changing the rules for existing customers or being otherwise duplicitous. None of that applies here - they've not launched the product and the reason you're here complaining about it is because they've informed you prior to purchase of the limitations imposed. You are not forced to buy this. You are an adult who can presumably weigh up the pros and cons of each purchase you make.
And to answer your question; yes. If this sharing mechanism works as per the official word to date, then yes many people will want to buy the Xbox One. You see a lot of people defend Steam because while there are no trade-ins, the value for money of the service is quite high. A large swathe of people here don't really care about "customer rights" - they care about value for money.
And that's frankly very sad. But, I'm not going to harp on you for your choice. Not here at least. I WILL combat you on calling it anti-consumer however, because no matter how you spin it, taking away private reselling of the game discs is anti-consumer. Full-digital cuts out the physical disc and the associated expectations and wouldn't run into this problem. But the discs exist, and so the expectation of being able to do what we want with them is there. Not everyone feels this way, obviously, as you and others that share your viewpoint have asserted, but MANY people do, and it's evident. MS's policies with the Xbox One are both anti-consumer and by default a bad value proposition to a great number of people; the two terms are not mutually exclusive.
Eh... I don't think it is a good idea to discard OFFICIAL communication channels. So far the countless contradictions and ambiguities only reinforce the idea that we should wait for a formal, concrete and official response before making any decision.
The Xbox Support twitter has a record of being unreliable, and it makes sense because...it's a support twitter. The employees running it won't know a whole lot of stuff we don't already know about the system.