Several teams have used the start and park in the past. Without it, Brian Keselowski probably wouldnt have been able to race his way into this years Daytona 500. Regan Smith wouldn't have been able to pull an upset and win the Southern 500 at Darlington. Landon Cassill wouldn't be able to get valuable seat time in the Sprint Cup Series, and Dave Blaney couldn't put up solid finishes.
We all hate seeing it. You're watching the race's standings ticker looking for your favorite driver. Usually per race, there are 5-7 drivers that only run a handful of laps, for quite simply, a paycheck. While we all hate the idea of a few guys taking money, and starting spots from other drivers, Its good for NASCAR, in fact, I'd be willing to say that its great for NASCAR.
While it may be sad to some to see 5 cars drop out of the race after the drop of the green flag, in 2 to 3 years, it will be great for NASCAR. more drivers will be able to enter races, make qualifying more competitive, and in return, make for a more competitive race. Currently, barring any major upsets, there are typically 5-10 drivers that can win on any given raceday. In 2 or 3 years, there may be more like 20 to 25 drivers that can win.