Wetware Hackery

You can't see me because you've been hacked, and your mind has been compromised. A virus has been installed into your subconscious that makes me undetectable. You have no recollection of when you were exposed, in fact, you have no idea that it's been done at all. Reading this now, you'll just shake your head and in a moment this too will have been forgotten, such is the insidious nature of this mind code. Absolute invisibility. It should worry you, but it won't.