A troll account created by someone who should know better. Pretending to be a newbie when they're clearly not.
I don't think any serious person believes that person is a newbie. He created an account with the handle "Three Millionth User" that has a UID of 3 million. If you are referring to his rank, you would still be wrong, as he does not control his rank, the forum displays his rank.
Three Millionth User has got to be someone's alt account and given that they haven't posted much since registering, I suspect that the primary account is too busy.
It is a vanity account. Similar to how some people use vanity addresses or vanity license plates. I think most people who are using a vanity address have received at least one transaction before even thinking about creating a vanity address. Similarly, it is very rare for someone to have a vanity license plate on their first car.