In the theme song for the old television sitcom "Cheers," the Boston
bar was the place where "everybody knows your name." To prove it,
every time the character Norm walked into the establishment, everyone inside
shouted out, "Norm!"
But the Internet isn't "Cheers." On the Internet, it's not
always advisable to let everyone know your real name.
Instead, many Internet users
create usernames that incorporate details unique to themselves, even if those
details are only initials followed by a three-digit number.
it may not be a person's official legal name, a username makes an individual
user recognizable within online communities. A username can be just as much a
part of a person's identity as the name on his or her birth certificate. Read more.