I'm not terribly worried. At the end of the day if Facebook did this the patent revocation would likely be unenforceable. This would be a simple example of Unco

I'm not terribly worried. At the end of the day if Facebook did this the patent revocation would likely be unenforceable. This would be a simple example of Unconscionability. You can't enforce a contract that is grossly unfair. This entire thing is an anti-patent troll measure.