Google is an incredible tool.
inurl:hp/device/this.LCDispatcher
Enter this and you'll find a whole bunch of printers, and a lot of them aren't even passworded. You can get in, change settings, and even print documents. I think they have to be "print ready" formats, though, like PDF's.
Someone ought to make a big goatse PDF with the title "SECURE YOUR FUCKING PRINTERS" on top and print that on each of these printers 50 times to teach these morons that the entire fucking Internet potentially has access to their printers.