Board Thread:Support Requests - Community Management/@comment-3235402-20130404181023/@comment-3335785-20130404232620

You can alter the license your content is released under without too much issue, however in a wiki environment it could cause problems. Your specific issue is a non-issue in my mind: CC-BY-SA allows re-using of content as long as attribution is given. Those complaining do not have a leg to stand on as the situation stands.

Community Central:Licensing states:

"Except where otherwise specified, the text on Wikia sites is licensed under the Creative Commons Attribution-Share Alike License 3.0 (Unported) (CC-BY-SA)."

"Some wikis use licenses other than the CC-BY-SA license. The license used by an individual wiki is made clear in the footer and/or on the edit page of that wiki."

As you can see it is perfectly allowable to alter the license of content by simply adding some sort of copyright notice to the page, This content is copyright of Roads for example. I've seen it used for Wikimarks, although I've not explored how secure in terms of copyright law that notice is (something you will probably want to do if you are serious about this).

However, I am not a legal expert, and hold zero qualifications. My total experience comes from learning about Fair Use, and CC-BY-SA on wikis, and helping a friend revise for their law degree exams. Special:Contact/general will be able to give you more information on this, but again you will not find anyone who is a legal representative or anyone willing to act as one.