iPeng-based player: Prevent remote control of other Squeezeboxes

I have an iPeng-based playback system in the kids' room (iPeng with playback function, running on a docked iPod Touch), and I'm quite happy with it.

Unfortunately, every now and then, some kid presses a wrong button in iPeng and ends up remote-controlling one of my other Squeezeboxes (or sync groups). Is there a way to prevent this? In other words, can iPeng be made to control only its own built-in player, but not the other clients?

Thanks in advance!