The issue surely is one of archaeology, and where one lets sentiment draw boundaries. Nobody objects, so far as I can see, to archeologists salvaging, say, Spanish galleons, although these are grave sites where people died horribly. Titanic is different only because it is recent; so we connect with the people personally, and we also still have with us examples of their technology, artifacts etc., so there is no historical reason for salvage beyond the fact that it is the Titanic. So whether or not you salvage is a matter of where you think historical interest shades into prurience. I don't think disturbing the dead comes into it - we do it all the time; sticking endoscopes into mummies etc. Which reminds me, Jake, I think they have recently found some rather nasty fungal spores in mummies which may well account for a couple of Tut-associated deaths (Discovery channel again!), and I think it is probably better not to believe in things like mummies' curses in the 21st century.