Voted to continue. This is a complex case IMO and not that straightforward but first, this is not cfc, so cases ruled there by some judge do not automatically apply here. Second, rolling back is not an option although we can ban this for the future if majority wishes.
IIRC, I've been to one case where all cities were gifted in a PBEM and finally accepted after a lot of doubt and that was within the spoiler here:
http://www.civ3duelzone.com/forum/to...TOPIC_ID=2182a
However, that case was exceptional and does not clearly apply to Civ4.