If an organization publishes a crowdsource storymap, all the images and comments, regardless of who the contributor is, get stored in that organization's content. Is there any notice, warning or disclaimer as to who then owns that material? I expect someone is bound to ask, sooner or later. Does the contributor retain ownership or any rights to it? If so how can they delete it if desired (answer, they cannot). Does the publishing organization have the right to set their own policy with regard to this?