Content created in Sakai could be more accessible if making the img alt attribute a required property when adding an image through CKEditor was optional.
This would ideally be set by a site property or sakai.properties.
It is not always better to have alt text than not, for example it is not needed for decorative images. But in the Sakai use case, it is approaching
99% of the time where adding alternative text for an image is more desirable than leaving it blank. Areas where the Rich Text editor is available in Sakai rarely lend themselves to adding "decorative images".
Jim Mezzanotte reached out to the CKEditor community. They indicate that it is indeed possible to configure CKEditor to require the alternative text to be set before finishing the image add dialogue. http://ckeditor.com/forums/CKEditor/Configuring-to-require-image-property-entries
If this CKEditor configuration could be mapped back to a site property or sakai.properties value institutions could decide to enable this requrement.