Individual-I is a new campaign that Bruce Schneier has launched, to promote the idea of individual liberty. The sign shown here — a vaguely humanoid capital letter I — is intended to be a readily recognized symbol of personal liberty, freedom from surveillance and control, guarantee of due process rights and other fundamentals that are eroding in today's world. It is meant to be as recognizable and simple as a peace symbol or a cross, and as iconic.
I think it's a wonderful idea. Bruce isn't claiming any ownership or control over this, hoping that it will grow organically (though he will help you sell your Individual-I merch through his site). I got some Individual-I stickers last week at the Computers, Freedom and Privacy conference, and they will shortly adorn my laptop.