You would have to sell the tags too for when people buy them and frag them so they can be further tracked from the source. I'm also thinking that wouldn't fly over seas, most people don't want people knowing their collection spots and the culture in some places are pretty brutal compared to ours. Example, a wholesale in Indo was caught fooling around with a young girl and he was murdered. His body was found in a hotel room and his head was found in his car, lol. There is also lots of stories of divers comming up missing etc...
not to get off topic..but it sounds like his crime wasn't diving.... let the punishment fit the crime...sounds like he got what he deserved