I don't see why I should dodge the ball or just let it hit me. I do not need to touch the ball after a made basket, but the rules do not prohibit me touching it. The player gains no advantage by tossing me the ball, he may even lose a fast break opportunity. Nobody is going to get surprised because the official unwittingly participated in a "trick play".
I'm there to facilitate the game. So if a kid has a brain fart and tosses me the ball after a made basket, I just toss it back to him and we go on. If it happens again, I'd probably talk to the kid at a break. But why would I make any kind of issue of it?