Oh, yes, I know exactly what you mean about that extended hand gesture. I won’t do it.
Another thing I won’t do is applaud for musicians, choir, First Communicants, etc.
My standard practice for several years now is right before the Our Father, I get out a Kleenex or usually a cotton handkerchief from my purse, put it in my right hand, and when the hand holding or shaking hands comes, I show the person that and gesture to my nose like I have a cold, and they NEVER want to shake hands. Like stopping a moose in his tracks...........