Well many BDs come from the same master as their DVD counterparts but that doesn't mean they are the same thing - the resolution is the main difference between the two formats after all.
Like it or not, the policy is that if you want to download an HD restoration, you have to own the BDs and it makes sense because since the added resolution is the main value added for the BDs, acquiring the film in higher than DVD resolution some other way without also buying the official HD release is piracy.
In many places its legally piracy even if you do own them. So it becomes more of a moral issue. Which is much less black and white. In fact I could think of one or two reasons why buying the bluray is immoral. But that's a whole discussion on it's own.
That being said. If site ruled state something and the creator of said edit wishes it., you're best off just keeping it to yourself.