The police and paramedics can do this by placing bodies between camera and patient or by using sheets and blankets. Arresting people and confiscating equipment is not the way to provide a patient with privacy.
If you are in public you have should have no expectation of privacy. If someone edits and shares the video to change the story then that could be grounds for libel.
Why not move the heat-exchanger (thin walls and all) into the ocean. Have a closed-loop of FRESH water that you pump around. It cools down in the ocean and then is pumped back in, through the data centre, heats up. Now you've got internals (and your pump) free of salt. Yes, you still have to maintain the outside of all the pipes AND the ocean-side of the heat exchanger but that seems easier than moving salt around.
Ahhh, that made my day.