At least for Casablanca, they resisted the temptation to tinker with the content of the film. Let's make it widescreen! Let's edit out all the cigarettes everyone is smoking! Let's make the roulette wheel honest! Let's have Victor die heroically so that Rick and Ilsa can get married getting the happy ending!
Yeah. While I'm for upscaling, meaning I'm for improving the clarity of what's already there and making it look the best it can... I'm against changing what's already there.
Unless it's correcting some glaring production error. Or correcting something that was done against the director's will. Like removing those stupid narrations that were in the 1982 theatrical version of
Blade Runner.
Things like getting rid of the cigarettes? No. Smoking was huge, it's the way it was. I'm a non-smoker, but this fact doesn't offend my sensibilities. Nor should it offend anyone else's who has common sense. Hell, my favorite show of all-time is
Mad Men. The level of smoking there was ridiculous, but it's still my favorite show.
From what I understand, they've made all kinds of stupid changes to
E.T. I'm not a fan of that.
Rocky vs. Drago is kind of gray area. It's the director himself who made the changes, and the original
Rocky IV is still available.
Cropping an image to widescreen? I'm against a blind-cropping where someone decides to idiotically chop off the top and bottom without a thought about how it if it would chop off people's heads or get rid of important information. I've heard about how horrible the cropping of
Gone With the Wind was, when it was re-released to theaters in the '70s. Not something I'd want to see. OTOH, if someone did a tilt-and-scan, and knew how to make sure all the important visual information was kept in each and every shot, that I could support
if they were very careful with it.
At the end of the day, I don't have a "one size fits all" mentality. Some changes are for the better, some are for the worse. It depends. If something looks or feels wrong to me, to be brutally honest, it's really a case of "I know it when I see it."
On the Star Trek end, I think TNG is how you do a re-mastering and TOS is how you
don't do a re-mastering.