I'll leave it to others to complain to the Russian Embassy that Russia's former and likely future President did not excavate the amphora in question scientifically.
Addendum: PM Putin's office put up this interesting transcript about his discovery, where he indicates his excavations were done with the help of archaeologists and that the he hopes the area will be preserved and exploited for touristic purposes. See
Meanwhile, the NY Times suggests that he dive is but one of many events staged to help ensure PM Putin's standing with Russian voters. See