If you detune a modern television, pull the plug out of your cable receiver or don't have an input connected to a screen or projector then the words "no signal" are usually what you'll see displayed. For me, it implies a disconnection from something... rather like the relationship between myself and society (I just "don't get" most people, and don't feel much connection with the majority of the people that I meet).
The zero in there rather than an 'O' usually ensures I can have it in most forums/message boards and you'll find me under this name on the Privateer Press boards, Infinity forum, Fantasy Flight, Spartan Games, etc. I'm everywhere. Like a disease.