Worst username you've ever seen.

[Vitor Goncalves]

Anything with X_x_X*insert nick here*X_x_X or anything similar.

Seconded. It's like they think maximum X-age makes them holy.

Thirded, and also the guys as Nyhm parody/machinima on youtube wold mention as Mr. with unpronounceable name guy, someone like "cxjsdfnslacnidj" username.