What exactly does that do?
I simply ignore them and keep doing what we are doing. If you acknowledge what they are doing, you are rewarding the behavior.
Putting them to work gets their focus back on you. By making them move, you are showing them your dislike of what they did. If you acknowledge the behavior by petting or coddling them, then you are rewarding them.
Ignoring a bad habit may not make it go away. Let's say a kid picks his nose. Unless someone tells him he shouldn't, he'll keep doing it, and think it's alright. He may stop sometime on his own and maybe not.