I had the same issue.
Yapta - Track Airline Flight Ticket Prices and Airfares, Find Frequent Flyer Seats, Save Money is a site that will watch your fares for you and let you know if you should pursue a travel voucher from your airline, but like you, I wasn't going to pay more money for some stinkin' voucher.
I'm a planner, and as such, I overpaid for my tickets.
Driftin' by is an opportunist and saved a ton of money on the same flight.
But... that story about the ant and the grasshopper? I don't remember how that story works out, but I think planners are somehow rewarded.
I'm thinking Driftin' by is going to get strip searched at customs, get the hotel room next to the air compressor, and get seated near the kitchen at dinner, while I'll have the most fantastic vacation imaginable.
I'll get upgraded to first class... get seated next to a supermodel on the flight..... get a free room upgrade, and see a whale shark and a mermaid on the very first dive.
And then, and only then, I'll feel good about paying twice as much as the dude sitting next to me on that stupid Continental flight eating my free bag of peanuts.