I agree though, imo the word you're thinking of is probably banned and the linked list is not a complete/exhaustive one.
If the word is banned you will get an error message saying "Instagram: (400) APINotAllowedError-This tag cannot be viewed" at the top.
In a country with 35.7% obesity (e.g. 203 pounds at 5'9" = obese), you'd think it would be a good thing to let people inspire others to get back to normal weight.
http://hashpix.herokuapp.com/s/scunthorpe (thanks @DjangoReinhardt!)
http://en.wikipedia.org/wiki/Scunthorpe_problem
(EDIT: still can't format comments correctly)
I've been lazy about writing a good filter to weed out the nasty ones. I considered quite a few approaches - ranging from an NLTK-based algo to basic brute-force list-search with word-stemming. Then I realized, it would take me a lot more time to develop that, than the rest of the project.
So, I chose the easy way out. Turn out it saved me quite a bit of effort, too. :)
The Instagram API returns an APINotAllowedError (response code 400) when you search for one of these hashtags. I'm using it to automatically identify and categorize NSFW hashtags for one of my projects, HashPix. You can see it in action at http://hashpix.herokuapp.com/
