I immediately had an answer (glib much?) -- hang up a sign reading FREE FUEL and wait for an onslaught of salvagers -- but decided I'd better dig.
Funny; read past the first paragraph and you find out the worried guy is one Corrado Clini, Italian Environmental Minister -- as in, that worry is his job -- and that the company that operates the ship has already hired a top firm to refloat (or at least salvage) the ship and take care of the fuel.
So relax. Yes, it would be very bad indeed if the fuel spilled but you, me and the networks are not the only ones who know that.