How is dropping a reserve day that either, gives you a day off you need or, dropping a reserve day to prevent being assigned a 4 day trip you don't want ..... that is allowed by the contract, abusing the system. Couldn't ever figure that one out when I hear these statements.

The company signed the contract allowing you to drop single reserve days that showed green on the grid. It wasn't abusing the system. It was using the contract to benefit you.