Their methodology is anything but scientific, but that doesn't make the results any less amusing.
FOURSQUARE NAMES WORLD'S RUDEST CITIES
By Chris Matyszczyk for CNet
If you travel around the world, you sometimes find yourself marveling at just how many different cultures can intersperse every second word with an expletive. It's a talent that some might say the British have turned into something resembling an art form, as long as you have a refined interpretation of what constitutes art.
I am therefore expleting with joy that an English city has been named, by the politically correct techies at Foursquare, as the world's rudest.
How did Foursquare come to this conclusion? Well, in a post on the the company's engineering blog, Matthew Rathbone, an engineer who describes himself as a "proud British midlander" (this may be a first), explained that Foursquare is looking to make sense of all the data it has at its disposal.
In this example, he looked at all the world's English-speaking cities. (Glasgow was out, then.) He analyzed which of them featured Foursquare tips including words that might not be welcome at a place of worship.
The northern English city of Manchester flew to the top of the table, as if it were borne on cursed wings. You will be wondering which city came second. Please bow and scrape to El Paso, Texas, which wasn't far behind Manchester in words you'd rather leave behind.
Strangely, Pittsburgh, a town where they really do have good reason to curse at all hours of the day, only came a slightly distant third, followed by Bloomington, In., (surely you won't blame Bobby Knight--he left years ago) and Riverside, Calif.
British news organizations offered their own interpretations of Manchester's blessed supremacy. Metro.co.uk, for example, suggested4: "We can only assume that it's lots of people saying things like 'try the f***ing lamb' or 'the mojitos are the the t**s."
So, you see, this isn't swearing. This is enthusiasm.
(Full article here at CNet.com)