Do I bend the rules, yes sometimes. But only in certain ways, like there being a rare event happening in the back plot that there are no rules for. (for example a massacre at the site of another massacre causing a very short lived temporary portal to the negative energy plane to open from all the negative energy caused by the deaths.)
I also have many instances where I've created new monsters and classes, which I don't consider bending the rules, this I consider just adding new rules to the game.
I also have many instances where I've created new monsters and classes, which I don't consider bending the rules, this I consider just adding new rules to the game.