When using the webui, have Special:MovePage present a warning (similar to MediaWiki:Delete and move text) when the destination of the move is subject to protection or the title blacklist. Even if it doesn't need an extra tick box (like deletion does) and just needed the user to click move again.
Currently there isn't a warning given to a user if they perform an action using Special:MovePage which is restricted (discounting if the target exists).
Examples:
- Page protection
- Destination title is a new page and has any create=x protection in place
- Destination title is an existing page and has any edit=x protection in place
- Blacklist
- The destination title is match to the titleblacklist
See also this discussion: https://en.wikipedia.org/w/index.php?title=Wikipedia:Administrators'_noticeboard#Warning_for_admins_moving_pages_to_create.3Dsysop_pages
(Permalink to current version - https://en.wikipedia.org/w/index.php?title=Wikipedia:Administrators'_noticeboard&oldid=639902839#Warning_for_admins_moving_pages_to_create.3Dsysop_pages).
See also discussion of mechanics options here: https://en.wikipedia.org/wiki/Wikipedia_talk:Page_mover/Archive_2#Adding_warning_for_page_moves_to_certain_targets