I wouldn't say it's entirely paper tiger though, given that it also discourage you from exercising any patent you have against Facebook, no matter how legitimate the patent is.
I'm neither a native English speaker nor a lawyer to really understand the wording in the legalese, or if it only cover software patent or patents in general, but I think that clause is pretty broad.
I'm neither a native English speaker nor a lawyer to really understand the wording in the legalese, or if it only cover software patent or patents in general, but I think that clause is pretty broad.