The article states this was a private Skype call. That's quite important.

If Microsoft bans swearing in public, it's fine by me. Actually, it's probably a good thing, Xbox Live chat is terrible and could do with a cleanup.

However, It's my right to say what I want to my friends in private. I swear a lot when I'm on Skype calls. Probably too much, but that's not Microsoft's call to enforce. No pun intended.