When RobotoDomo is offline, Luigi comes out to interact with the world. RobotoDomo is essentially Luigi, though like most people on here, RobotoDomo is masked.
Luigi spends his time in school and home, considering his tender age of, well... let's just say he's in highschool (let's avoid stalkers yeh). Luigi is considered by most to be a weirdo. But of course he thinks differently about that matter. Though literally, he
does think differently. He considers himself to be smart, though he never really expresses the thought to other people. Besides, it never reflected in his grades that he was smart. But Luigi never believed that those numbers were the basis of a person's intelligence...
Luigi once tried to express his thoughts and opinions to the world. Presumably, that was the reason why he was declared weird. He never shared any further opinions since then. He tries to please everyone, though now he's sick of it. He now decides to shut himself from the world and try to recollect himself through the internet, and the many people in there.
Generally, Luigi is a happy-go-lucky guy. He smiles a lot, though people don't really know the things that is going on in his head. How bad they made him feel, how much they have humiliated him, how desperate they made him to change. All he wanted was to fit in. But he never could. He was different.
Luigi is a geek (not really) and quite obsessed with Minecraft and Phoenix Wright. No one else knew/liked those fandoms as much as he did. He had no one to share his experiences with, other than the internet.
Basically, RobotoDomo and his other internet names is the same person, but justified. His acts were justified in a sense where he wasn't judged when he uses the world "feels" in the internet. Justified when he didn't have a girlfriend or anything. Justified for liking a game where you are a defense attorney defending clients. Justified when preferring a game that is pixelated over crappy strategy/shooter games that are so generic, when, the only thing that can keep it going on is its graphics. And not judged when he draws random stuff. And definitely, justified for speaking English when others do not/cannot. RobotoDomo; he's Luigi out of his shell. When others are obviously wrong, Luigi is quiet. But RobotoDomo will shove the facts unto the person's face. That's him, and that's internet him.
I apologize for my over dramatic wall of text. My first time expressing myself. ._.
TLDR; Roboto is Luigi, but better and more socially acceptable.

I can completely relate to that. I'm usually quiet about the opinions I have on people and today's society and unlike you, I have never expressed my opinions to other people before, so I really respect you for having a go.
I do believe things will get better in time though and I hope that one day I'll have the courage to express my opinions without worrying about what other people have to say. ^^