I am so mad

So I got onto 4chan for the first time in my life.

And I get a message like this:

"You have been permanently banned from all boards for the following reason:

Being underage.

Your ban was filed on April 16th, 2011. This ban will not expire.

According to our server, your IP is: 74.112.212.15. The name you were posting with was ReimuHakurei!!jfioGdYT+nh.

Your appeal was reviewed and denied. You may not appeal this ban again."

What the hell?!

I've never used that username, never even been on 4chan, never appealed a ban, never been banned (by anything, ever). Do I sound like the kind of person who'd name themselves something animeish like "Reimu Hakurei"?

I am so mad. And so confused.