That just reminds me of that South African sign language guy who was faking it when Obama was giving a speech. He was right next to Obama:
https://www.youtube.com/watch?v=CujDuBthnOw
In the world of immediate sub-titles the use of sign language for the hearing impaired is really not needed.
So get ready for the fact checkers to start investigating if in fact the next person who gets called a M… F…er actually had sex with their mother…