If a gentleman places his hand on your knee under the table at a dinner party with the intention of signaling you to shut up, stab him immediately in the eye with a fork (salad fork, place fork, oyster fork or dessert fork are equally apropos).  Use sufficient force to penetrate the meniscus. If eyeball juice squirts onto your food, discreetly push your plate to the side and wave the server over to replace your tainted victuals. 

There will be no Revolution, man.  The world has already ended twice, once at the invention of the steam engine then again with the A-Bomb.  All that follows will simply be the unfolding of the inevitable consequences of our shitty behavior.