You missed the "Facebook revoked Voxer’s access to key components of the Facebook platform". That isn't a good look when you exclude the competition even if you own the platform. Ask Microsoft how well that works in court.
Wait what does this mean? Isn't the whole point of patents that it's supposed to be public? If so, how could you "share" them any more than you already did when publishing the patent?
1. "Facebook approached Voxer about a potential collaboration that led to Voxer sharing its patents and proprietary information with the company"
2. Facebook then said 'naaaaah'
3. Facebook then copied some of the technologies he'd shown them to both Facebook and Instagram
The conclusion most people would draw is that Facebook is a piece of shit.
Does that clarify things? Or would you like to keep suggesting that people here have double standards regarding software patents?