What about if there's no harm? What if you ENJOY lying about who you are?
Or, in another twist, what if lying about who you are opens a new world to you, and makes you a different person, perhaps even who you lied about being in the first place? (In the sense that you invent a new identity for yourself, like a Nothern Jewish family boy like Robert Zimmerman emerged into scene as the "wretched hobo poet" Bob Dylan).