Isn’t messenger service needed for Wins?

I have a customer site who’s admin turned off the messenger service on the PDC to stop the pop up notices from completed print jobs. Even though I showed him how to properly stop print notifications from being sent, he refuses to enable his messenger service. Netbios uses to that to communicate with other computers, so wouldn’t his Wins clients be having difficulty resolving querries without the messenger service running on the Wins server? I can’t find a short statement in any manual that would be proof to my customer. If I’m wrong, is there any reason not to turn off the messenger on a PDC?