Let's see...
U2 are a business. That's right (gasp!) a business! They are, at the end of they day, trying to make money. (Say it aint' so!)
They have spent several months (years?) creating a product. Something that represents their best efforts (we hope). And they want (wait for it) other people to pay to enjoy their product.
They will promote this product as much as possible. They will offer several versions of this product, knowing that some will be willing to pay more for a few extras. They will promote heavily via television, radio, internet (where are we anyway?) and ultimately, through a lavish tour filled with expensive merchandise and high priced tickets.
Is this greed? Then I guess every band on earth is greedy. Until they start giving it away for free, right? Maybe you'd like to start offering to go into work and provide your best efforts and talents for free? I'm sure your customers (or your boss, whatever the case may be) would love that.
Sorry, the real world doesn't work that way. No matter how badly you want it to. Not even for U2.
Exactly The Greedy people are the ones, myself included, who want this thing to leak and get it for nothing. Of course, we will all buy it/download it legally, but we are a small fraction of the people who want to get the album. Many will be perfectly happy just having the songs and therefore will not buy it.
BTW I only include myself in this because I want it to leak for informational purposes only. I want to read all the real fan reviews here between now and when I buy it. However, I have made up my mind that the first time I will be listening to NLOTH in full will be March 3 with just me, my computer and a pair of headphones.
U2 is right to want to protect and be compensated for the work they did.