When it comes to addressing someone who you don't know personally in life, you address them as Mr. Lastname or Ms. Lastname, correct?
So why should the internet be any different?
If someone who doesn't know me personally addresses me as Gia, I take it as somewhat of an insult. I mean, most people ask "What do you like to be called?" before addressing me as Gia. Since I'm not going to just offer up my last name to anyone on the internet, I would expect them to call me attitudechicka, as that is the closest to a formal name as you can have on the internet.
Even persons from this site have called me attitudechicka for a while before shortening it to A_Chicka, then to Chicka, then the select few who call me by one of my nicknames/my first name.
I also think that your mouse should be on the right side of your computer keyboard, which should be directly in front of your monitor and you should have a drink of some kind to the left.
Mind your computer manners!
---
Mediocrity at its most average.