I think Anonymous is Dan Hauss.
Now i know some of you may call me a fool for saying so, considering he is a published artist here. But here me out, as i am skeptical of my own point of view. The answer to the riddle was "ballon," which i believe to be the first clue. THe second clue given out was the phone sent to magicman, the second clue. Judging by the second text sent to the phone, which i will not reveal the actual translation of, i think the phone somehow ties into the balloon.
Which brings me too my theory of Dan Hauss. My friend Charlie, the guy who got me into magic, once showed me a trick, which had not dawned on me until recently as being possibly related to this. The trick was: to encompass a cell phone into a balloon instantly with sleight of hand. The method was simple, but when i asked my friend where he had learned the trick yesterday, he told me he had learned it from a lecture at our local magic store. Who gave the lecture you ask, as i did as well? Dan Hauss. I wish i had been there, but i was unable too because of my duty to my school track team. This is my two cents, and i hope may spark some interest in some of you or some clue to his identity. Dan hauss is old, he has brought tricks to Theory 11, he is new, because he has never been part of a major project, and never had his own page on the artists' page, which anonymous does now.