@MagnusSonofCarl I think the real question is why do people choose to make their account Magnus or some other chess pro.
Is it a form of flattery?
Is it to try to impersonate a good player to intimidate their opponents or to try to get attention?
Is it because they have lost their mind and forgot who they are?
The world may never know.
The only thing the world does know is that everyone looks at such people with disdain and pity.