I think it is a bit silly to complain about re-purchasing the same movie on multiple formats (VHS, DVD, Blu-ray, 3D, etc.). To me there is nothing evil about it; it's simply the price of technology improvement. It is not like there was a crystal ball with the blu-ray specs available when DVD was being invented.
Even complaining about multiple releases on the same format is not really warranted. It's simply a supply/demand issue.
I'll use Avatar to make my point: If the first home release of Avatar had been November 2010, there would be a lot of people complaining about not being able to get it sooner (I would be one of them LOL). But now that they met the demand, and released a barebones version early, now people are complaining about buying it again in November to get the more complete version.
Myself being a big fan of the movie, I decided to buy both versions. It's not a big deal... I've already gotten my $25 worth out of this release, and by November, I'll be eager to see the extra footage and documentaries. I'll probably be able to sell the version I have and recoup at least half what I paid. It's all good.
I would also add that many times the bigger/better more special editions are not planned until a demand exists. Most of the time a wimpy first version comes out the studios have not yet committed to a better edition until sales figures of the barebones version exceeds their expectations.
I can even think of one that had the opposite problem: The Matrix. The first blu-ray release was the big ultimate box set, and people complained that they JUST wanted the first movie, and just a simple movie-only disk. They listened, and it was released that way later.
Speaking of supply and demand... where are my Star Wars and extended Lord of The Rings blu-rays?