Tropes that are there because the writer had to include them - especially when a sharp-eyed viewer can tell the creator would have preferred to leave them out. It happens for a number of reasons: * Systematic Executive Meddling * Moral Guardians * A Censorship Bureau * Necessary Weasel (Requirements of the genre. For instance, if you want to do a Police Procedural, you had better include the procedure.) * Constraints of the medium * Government regulations May lead to Writer Revolt in extreme cases. Clever writers may attempt Getting Crap Past the Radar.