Just because its on wikipedia doesn't make it so. That article is just someone's opinion on film preservation. I respect that opinion. I respect your opinion. I agree with your opinion - to a point. I happen to have a different view on the subject.
And, in case everyone missed it the other 5000 times I mentioned it - I would be very happy with a straight cleaned up version with the effects left untouched. (Ok, I'd be pissed if you could still see the garbage mattes but those can be dealt with I think by subtle color timing adjustments and wouldn't break the "rules" of preservation, seeing in theatrical screenings they weren't always visible - but if they were there it wouldn't be a deal breaker either) I bet if they were removed some of you would boycott the release though. Imagine that, refusing to buy the restored OOT because an almost invisible flickering box was removed here and there....