This is a weird article released in Popular Science suggesting that the content of tweets posted by someone in a specific area could be determined and influenced by the surrounding community overall environment. This concerns delusion of influence or I know nothing about delusion of influence : your thoughts don’t really belong to you & are guided from outside of your own psychic (imposed/stolen thoughts, telepathy, inner voice, etc…)
http://www.popsci.com/twitter-can-tell-if-youre-more-likely-get-heart-disease