I don't know about openly hostile. Definitely making moves that the user base openly disagree with and think are, at best, very bad decisions, but I don't think they have crossed the "hostile" line. And MS is not alone with those kinds of decisions.

Apple may not "force" you to use an iCloud account for their devices, but they sure push it hard.

As far as Linux communities go, Red Hat, Arch, Cisco, and even Ubuntu have also done their fair share of "bad decisions".