You don't use your real name then. You use a nick here and your first name only, as far as I can tell, on SO. Whilst the information there makes you traceable it's still not 'using your real name'; unless your full legal name is only 3 letters?
Any idea whether I can make SE show the "real name" field to anyone? I didn't realize that wasn't visible, and I don't see a setting anywhere to change that.