Since the launch of Wikipedia in January 2001, a number of controversies have occurred. Wikipedia's open nature, in which anyone can edit most articles, has led to various concerns, such as the quality of writing, the amount of vandalism, and the accuracy of information on the project. The media have covered a number of controversial events and scandals related to Wikipedia and its parent organization, the Wikimedia Foundation (WMF). Common subjects of coverage include articles containing false information, public figures and corporations editing articles for which they have a serious conflict of interest, paid Wikipedia editing and hostile interactions between Wikipedia editors and public figures.