Facebook has endured an endless string of scandals and fiascos this year. Business Insider reports Pivotal Research Group financial analyst Brian Wieser asserts in a new note that those problems are an indication that it has a deeper issue to deal with. He says, "The company has underinvested in putting in place the kinds of systems that would prevent such mishaps. That's a good reason to sell the stock." Facebook's bad year seems to keep getting worse.