There should be a proper dismiss action for the copyright notice. This could be either one of a window close (x-action), a box for "don't show thiss message again", or a preference in [[Special:Preference]] to not show this message again. It could also be several of them, or at least the user preference in addition to one of the other two.

See also http://www.wikidata.org/wiki/Wikidata:Project_chat#.22I_accept_these_terms_for_my_future_edits._Do_not_show_this_message_again..22

Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=45127