This letter obviously written by a lawyer is in itself hilarious, specially the bit where he offers to “sincerely and concretely” right his wrong and redeem himself
I am not sure how he can right his wrong, what is done is done. Best thing is to throw the book at him, give the 15,000 euros fine and some sort of suspended sentence (with the usual consequences to travel within Schengen) and make a public example on how actions have consequences
A better defence would be that he looked at all the other names scratched into the walls (some dating back to 100CE) and assumed it was traditional.
Which it is I guess, traditions aren’t always good things.
