There was a time when software was simply a product that could be resold by the end user w/o the vendor's permission. In the U.S., this is called the First Sale Doctrine. Once you buy a product, you can burn it, shoot it into space, give it to your hamster or resell it.
You can blame the 9th Circuit Court for totally jacking this up:
- http://en.wikipedia.org/wiki/Vernor_v._Autodesk,_Inc.
In effect, the 9th Circuit has ruled that software is not physical product you buy. It's an intellectual product subject to any agreement the vendor wishes to put on it. Obviously, this is a pretty crazy slippery slope to go down. When you sign a contract to buy a car, they can slip in tiny text saying "you simply have a license to use the car and ownership still belongs to the dealer"?
I'd say write to your Congressmen -- but they're all in corporate pockets so that's of no use.
Basically, this is just the way life is now -- consumers have less rights. That means you'd better freaking make damn sure you not only want the product but also know your license agreement rights before buying. (There are some sample piano VSTs that force you to use a hardware dongle AND disallow license transfers completely.)