Yeah Ceee, i know that. But it was not me, I'm from Spain and the one who cheated was some Italian guy playing on a French server. I was really surprised when I saw that, because someone was playing with my GUID, I don't know how that's possible.
I opened a ticket at EvenBalance and they said the can do nothing, but for example, my brother (who obviously play with this GUID) got unbanned from the ESL for this reason.