Titanic

When it comes to the Titan IMO, play stupid games, win stupid prizes. It's like electing to climb Everest. You know it's a risk and you choose to do it anyway, you choose the outcomes. I'm not saying their deaths aren't sad but they knew the risks and chose to go anyway.

Graveyards aren't for the dead. They're for the living. People don't die in graveyards. That's just where their left over meatsack ends up. When you go to a graveyard you aren't there to be close to what's left over of their decomposed shells. You're there to commemorate their memory.
Imagine going to a graveyard to leave flowers for your great grandmother that doted on you when you were a toddler. If they dug up that coffin, would you feel any sort of comforting love and affection for the left-over decomposed remains? No. You have those feelings for the memories that you were left with. You'd probably be a little grossed out by the remains. Or at best, have a bit of a clinical curiosity for what had transpired to them in the years since the owner's death. You might be sad that that's all that remains of her and that you don't have that person in your life anymore.

But you're not going to want to jump in and give her bones a hug. She's not there.

Ergo, remains aren't inherently deserving of respect. It's the memories of the person or people that we venerate. The space that they eventually disappear into isn't any more or less special than the soil in your back yard.

But I do respect that other people see it a very different way so I tend not to judge. I just don't put "Graveyard" together with "Memorial" because I remember people wherever I am and have ritual around their memory that doesn't involve being where the traces of their bodies are/where.

I think you vastly overestimate the amount of 'intrusion' to the site. According to OceanGate, they've made three manned trips in three years. That means 15 people at most (including crew) have 'desecrated' the site in the last three years. Hardly a tsunami of people. It's unlikely they'll do anything similar again for a very long time given what's happened, given that five of those people are now dead.

Obviously there's scientific investigation that's happened but that's largely because the Titanic provides a fantastic opportunity to learn about the deepest parts of our ocean.

I'd hazard a guess that local graveyards experience vastly larger influxes of angsty teens trying to summon ghosts worldwide every year than the Titanic has had.

And if you marked it with a monument like a large buoy or similar, you'd have the opposite effect. MORE people would be drawn to the area because it's now visibly marked on the surface where anyone with a decent sized deep-water vessel could get to. I can picture it now. Cruise ships selling "Titanic Monument Tours". At the moment you'd have people who made it out there under their own steam who can say "I was roughly above the Titanic" but you give someone a visible marker that they can access and suddenly "I've been to the marker" becomes the rallying point.

If you want to keep people away to respect a sunken ship the best way to achieve that is not to give them something to draw them to the area. At the moment the only people who can get within 3km of the actual ship are people who either have a reason to be there (science) or more money than sense. And to be honest Darwin seems to have a pretty good way of sorting that lot out.

Rumor has it these were very wealthy people who made this trip.. ??

At the risk of sounding bad.. They got more money than good sense it seems.. So along with the money to ...keep score... among there peers, they do things like trying to make this trip to have a ...one up... on others like them... ??

Just because they got the money for something like this, doesn't make it a good idea...

My 5 cents of opinion...