There are a few standards. They have to put a disclaimer in front of a movie if it's been colorized, pan and scanned, time compressed or altered in any other way. (IIRC, we have have the lobbying efforts of guys like Martin Scorsese to thank for that.) So, being upfront about what version of a film you're getting isn't as unreasonable as it sounds.
Problem is, Lucas is really the only one pulling this particular shell game.