Well, technicaly, Kaizo Mario is ment to be played with protection from accidents as the accidents are supposed to be impossible to see coming, and as for how hardcore that is, google if you don't know. Also, really, and this is for realz, there aren't supposed to be any "accidents" in DD. Really, it's not part of the gameplay, it makes no sense as a hazard etc. etc. But since you can argue that death is necessary (and the guys who made the game are arguing this on rather solid grounds) the compromise is necessary, and really, the alternative interface modes are quite good at preventing the accidents (well, mouse related ones, you can still get overconfident and hit space bar too much but it's way less of a hazard).
So, the OP got his problem solved, what are we doing arguig about this?
EDIT: @Wargasm - if you're not convinced, I don't feel like going into another "is this a puzzle or a roguelike" discussion, but do ask around the forums what it means when I'm the one defending a debatable design decision in DD.