Twitter heat map shows rudest and nicest places

I’m still not sure that Twitter is the best barometer of who we are as a society. Rarely, for instance, do we shout “RT!” before quoting someone in real life. But the Ukrainian (?!) web development company Vertaline has made some interesting maps of the United States based on where people say “Good morning” and “F*ck you” the most.
You won’t believe it but New York, Los Angeles, and Chicago tend to come up a lot among the rudest areas of the country. Those bigger metropolises do pretty well for Good Morning as well but are trumped by the South. Not much seems to be happening in the Great Plains and places like Wyoming, which is probably because not much really ever happens in the Great Plains and places like Wyoming.