Mining large amounts of data can create several benefits for business, society, and governments, but it can also create a number of ethical questions surrounding an invasion of privacy or misuse of data. Facebook recently came under fire for its data mining practices as it followed $700,000$ accounts to determine whether posts with highly emotional content are more contagious. The study concluded that highly emotional texts are contagious, just as emotions are contagious with real people. Highly emotional positive posts received multiple positive replies, whereas highly emotional negative posts received multiple negative replies.Although the study seems rather innocent, many Facebook users were outraged; they felt the study was an invasion of privacy because the $700,000$ accounts had no idea Facebook was mining their posts.