Wrt. the idea that without the grant, Facebook can sue you. A) There's this thing with "implicit grant" since they've open sourced it and grant you a license. B

Wrt. the idea that without the grant, Facebook can sue you. A) There's this thing with "implicit grant" since they've open sourced it and grant you a license. But even without this, and more interestingly, B) If they sue anybody for anything regarding React, wouldn't they immediately loose the entire community around React? "Damn, they really sued Widgets Inc. over some bs. patent in React, better stop using this minefield right away"..