Wiki.GIS.com:Copyright

Our copyright policy is to respond to notices of alleged copyright infringement that comply with applicable international intellectual property law (including, in the United States, the Digital Millennium Copyright Act) and to take down allegedly infringing materials and/or terminate the accounts of repeat infringers, as applicable. Further details of the copyright policy can be found at http://www.esri.com/legal/licensing/dmca_policy.html.