The question is -- ideas that are bad for *who*? This may be a very bad idea for you and me, but it is a very good idea for Microsoft, especially as, like their online services, they will make money off of us and it will be very inconvenient for us to opt out.
In civics-lesson style capitalism, which I'm all in favor of, companies compete to provide things for us that we want and we, armed with information about their products, services and prices, either choose to give them our business or to give our business to a competitor.
Not to say that stuff doesn't *ever* happen, but it's really hard to make a buck as a business that way. So what sufficiently large or well-placed businesses do is earn money *other* ways, by entangling consumers in business relationships that are opaque and which they don't have control over, may not even be fully aware they're signing on to, and which are complicated and awkward to extricate themselves from. In other words a well placed company, like Microsoft or Google or Facebook, will constantly be looking at ways to make money outside the rigorous demands of free market economics.