The Sicilian mob is sinking ships in the Mediterranean Sea.
These are not normal ships that would potentially make a beneficial reef.
No, these are ships that contain deadly radioactive material on board:
Pressure is growing on the Italian government to act over revelations that 30 or more ships with radioactive cargoes, deliberately sunk by the Mafia, may be polluting the Mediterranean.(The Independent). I think we can dispense with the "may be" and get right to the point.
This is a crime against humanity and should be dealt with as such.
There are reports that human skulls may be in the radioactive material so there is a possible murder case involved as well.