I remember seeing a documentary on the history of US TV and for a long time you couldn't use the word "diarrhea" on the air.
The way things change though I wouldn't be surprised within 10 years not only won't you need a documentary about the f-word on TV but it'll be part of every sit-com on.
As for spending 200k on a documentary about it, I don't see anything wrong with that really, like it's been said linguistics and the changes in use of a language over time can be very interesting subjects. What would be even more worthwhile is if they could finally definitavely pin down the origin of the word...there are currently about a half dozen theories that make sense in some way or another but no one has ever proven which one is the correct one.
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