One company's solution is the CubeGuard.
OK, CubeGuard won't keep intruders out of your cubicle as well as walls and a door.
But it sends a message.
The CubeGuard is a retractable banner about 2 and a-half inches wide.
It comes with messages like "Please Do Not Disturb" or "Out To Lunch."
You can even create your own message, perhaps something like "Get out, please, I hate you all."
CubeGuard's CEO John Stanton notes the keep-out messages are softened with smiley faces on the banners.
A standard CubeGuard kits costs about 20 bucks, the custom messages go for 30.