Wiki, Anonymous Users
Anonymous users are only allowed to view information on the Wiki.
Anonymous users are only allowed to view information on the Wiki. All permissions except for "View" have been disabled for this reason and Anonymous "View" permission may be toggled as well.
When Anonymous "View" permissions are turned on, this opens the space up for anybody on the internet to be able to see the space content including those without any affiliation with the campus.
See https://wiki.illinois.edu/wiki/pages/viewpage.action?spaceKey=HELP&title=Adding+Space+Permissions+for+Campus+Users for more information on making changes to Space permissions.