Not a lawyer but I believe that only applies to actual lawsuits. Anyone can send you a C&D and you can choose to ignore it. It will cost at least $300 to consult with a lawyer to even write a response. If the other party really believes they are right, they will sue you.
I can't find it now because google is garbage these days but years ago I once ran across forum thread or blog post from a small business owner who semi-regularly received random bogus patent infringement and other claims with offers to settle matter out of court for thousands of dollars.
He had a lawyer but after burning through a lot of money with carefully-written objections, he decided to just start ignoring them altogether. Which generally worked. These lawyers (and their clients) were just trolling for easy cash and never actually wanted to go to court because their claims were bogus and they would almost certainly lose.
Sometimes, however, the other party's law firm would call him on the phone to follow with their demands. He would let them yammer on for a few minutes, ask some innocent questions, and then finally interrupt them with something like this. "Here is what I have to say to your client's claim... you have a pen and paper ready? I need you to write this down. Okay, good. Here it is: 'Fuck you.' No wait, I'm not done yet. Just let me speak. I want you to also add, 'and go to hell" please. That is my official legal response. Have a nice day." And slammed the phone down.
Take the story with a grain of salt, but he said it worked 100% of the time.
The Reply of the Zaporozhian Cossacks [1] comes to mind as an appropriate response to Facebook, as does the reply of the Cleveland Stadium Corporation [2].
That would require a lawsuit IIRC, but it does have a some legal ramifications - I remember reading somewhere that C&D would make it easier for the recipient of it to sue.
It definitely doesn't help their image or any antitrust lawsuit FB might be facing.
