Thanks; you may have seen my set with
@MaxTennis, which was a heck of a lot of fun and captured for posterity by
@mad dog1.
If someone is losing to a pusher and doesn't see things turning around, coming to the net might at least put some pressure on the pusher because now he has to attempt a pass. He might succeed with flying colors but it forces him to get out of his comfort zone, which he wants to avoid at all costs.
So I'm not claiming it's a magic solution, just that it makes the typical pusher uncomfortable. It's certainly worth a shot if you feel like you're going to lose anyway. Consider it from the pusher's perspective: he's highly confident that if the status quo is maintained, he's going to win. The opponent making a radical change is just the sort of deviation from the status quo that the pusher doesn't want.