Wikipedia can be a great site when you need a quick reference on history, pop culture or even politics. But its reputation as an authoritative research resource is doubted by professors and other experts who deter students from quoting Wikipedia in their papers. One reason is that a lot of the information on Wikipedia is either incomplete or downright false. Because anyone can technically edit or contribute to Wikipedia, the site is vulnerable to hackers and vandalism. Sometimes, the blunders are serious libel cases which result in lawsuits; and sometimes, they’re just funny.