Water-borne diseases, I'm sure. It's easy for ice to be contaminated; if you go to a part of the world where tap water can't be relied on to be safe, skip the ice.
Say what? Do tell.
https://www.theatlantic.com/health/archive/2017/05/is-this-g...
It's interesting the article didn't mentioned suicide, which I've seen mentioned before as a cause of the myth. The story goes that papers popularised the concept as a way to avoid specifically naming suicide as a cause of death, as a kind of shared understanding while preserving the honour of the families. But a lot of people took it seriously so the idea gained traction.
Secondly, I’ve seen many ice machines throughout my prior work and would strongly recommend avoiding ice cubes as most kitchens don’t clean these properly.