If you're using a recent Linux kernel and udev, then you should be able to set up a udev rule to create the device node with the permissions you want, or even to not create one at all. And you can also use udev to run commands or scripts, so I'm sure you could work out some way to send an alert with it as well.
For more info on udev, see the links on this page:
http://www.kernel.org/pub/linux/util...plug/udev.html
