Cover your phb in spray adhesive and leave it sitting on the table. As soon as someone touches it, shout “ROLL INITIATIVE!”
Actually, apply this to other random objects at the game table. A bag of chips, 1 can of soda in the fridge, every 3rd pencil, whatever.
I’m not one of them, but I empathize with all the GMs that are just sick of dealing with those particular kinds of misconduct that crop up with new players.