Misblamed: A very sad example. Everyone - including Joel Schumacherhimself - blames him for everything wrong with Batman and Robin. The truth is, yeah, he designed the "Bat-Nipples" - but most of his other so called "mistakes" were only his response to please the meddling executives. They demanded a more "toyetic" design - a word Schumacher never even heard before. Meaning: Without the "Bat-Credit-Card", Ahnold in a silly, shiny plastic-armor and Uma Thurman's Gorilla-dance, he'd probably have lost his job. Of course, nowadays noone doesn't even think about blaming the Executives - somewhat ironic, as they're almost always the first to be blamed (especially on This Very Wiki) regardless of their actual involvement.
The Executives also wanted the movie to be campy like the old Adam West Batman, which explains a lot.