Some of these deaths were caused by people's stupid actions, though
This kind of stuff never worries me. Roller coasters are generally very, very safe, and I like them too much to actually let a .0001% chance or whatever stop me from riding one. These are all specific, isolated incidents, and the fact that you can easily report on each one of them shows how rare they are. You don't know the specific story of everyone who dies in car accident because they're far too frequent (I'd bet more people die in cars every day than all year on roller coasters).