No that is a stupid idea, you are essentially an officer of the server, put away the bad guys, give timeouts for the shit disturbers and help out the regular citizens with problems. The tag is your uniform and your badge, a symbol of your power that is unmistakable even to the blindingly stupid. Its a few letters at the end of your name that is constantly visible showing that no matter what form of communication you use, chat, voice, or even steam chat, that you are an admin and you should be listened to. Sure there may be other ways to see if a player is an admin but the tag is simple, it can be seen even in the scoreboard which makes it easy to quickly find the admins in server. Its a simple rule, 5 letters and a period, but it can go a long way for clarity.
"To attempt to have intercourse with a hornet's nest is a very bad idea," Siv During Livh, a psychologist and expert