I prefer to be semi-anonymous after years of having an employer that might, uh, grumble at my 'fringe hobbies'. They considered me odd enough as it was, and HR was prone to over-reacting aka 'getting in a royal snit'. At first, I even had to submit my letters to electronics magazines for prior approval. Fortunately, HR would promptly route same back to the engineers, to whose department I was effectively attached...
Also, I wrote an off-beat on-line novel about plausible vampires, and didn't care to put my entire name to it...
Since then, the habit has stuck.