Dungeon Master Intro
I believe in Rule Zero. On that same token, I also believe that things should be fair. This fairness applies to both the players and the nonplayers of the world.
I also believe that everyone at the tables main goal is to have fun. We all achieve this differently.
I enjoy weaving a story and allowing the characters a place to explore and make their own.
I am ok with the dice telling me that a character has been killed. Not every death in real life is heroic, and as such not every death in the game will be heroic. However this is no reason to give a character just enough life to get it by.
I also do not mind putting in encounters that the players should understand can harm them greatly or kill characters.
I fudge dice every now and then to help the story, the characters, to build tension or other reasons.