As LadySnow said :D
Just my opinion on the real name/face thing: this isn't DeathNote, lol. You can pick up on someone's energy if you know something they like very much. If it is someone you only know online, then you can connect via the avatar they commonly use, a manner of typing unique to them, etc. I'd say not knowing the name/face can make things a bit more difficult, but not that much so if you are used to sensing energy. The computer is a wonderful medium, putting people just a screen apart, so to speak.