there is a lot of this type of "mistakes"
if i would let my imagination to take over i could say they do it on purpose and say it is mistake only if they get caught.
Do you believe most of the world is honorless? If so, then no citation will convince otherwise.
On the other hand, if you believe most people are fundamentally "good" (or at least "mostly not evil"), as I do, then no citation is necessary.
Almost everyone of the thousands of people I've interacted with in the tech/programming field are good people.
Of course, there are plenty of horror stories in relation to the business side of things. It's certainly possible most of them are mostly evil; I have no clue.
You may have meant to talk about humans in general, but the context here is Microsoft. Your claim that Microsoft has very rarely acted against the interests of users on purpose is in need of supporting evidence, as the general sentiment on this social news site is that this is not the case.
To your question: Steve Mann has some interesting thoughts about how being a part of bureaucracy makes it easy to do evil. This is not a new idea: any discussion of collaboration in WW2 Europe will bring up similar themes. Do you think humans who are acting at the behest of an impersonal corporation are intrinsically good in that context?