He's a real person, but he has many other aliases. There are some pictures of him drifting around the internet. Like this one:
Here's a guide (pasted from a thread in rec.windsurfing) to his many aliases:
"Education may be the only way to help people become aware when they've
been had. When he posts, copy this so at least you will know what
you're dealing with. Laughter is the best medicine...when dealing with
da tar baby....
Good ol' comic charlie, aka Brucie, aka all the aliases below and then
some. At times he can be entertaining and at other times he can be
downright annoying. Most often, he amuses others as he makes a total
fool of himself.
Treat Brucie with a healthy sense of humor and you'll do fine with
him. He can sometimes be interesting and fun. Don't be afraid to poke
fun back at him as he pokes fun at you, but pound him into the ground
like a tent peg when he strays too far out of bounds.
And here's a series of comic strips that makes fun of him: