How is this any different than buying up cheap real estate before the region becomes popular for development?
Because with real estate, there's nevertheless an incentive to do something with it. And the new owner is still paying taxes, maintaining the area, possibly adding utilities/roads, etc. Some chump puts up a parked page, it's a non-value-add. (If parked pages serve some useful service to the Net at large, why do they rarely if ever turn up on searches?)
I started a new company recently, and I knew I had a great name for it when I discovered the net-leeches hadn't thought to register it. The name is wonderfully counter-intuitive (but not!), composed of real English words, and it's less than 10 letters. I paid my 10 bucks (per relevant domain) for what I need, and it's good.
Tom, glad you got your names back. I hope you'll thank your registrar for giving you a grace period to reclaim your domains.