Absolutely. I would use it as much as possible. It's also a reason I would stay far away from signing Greg Hardy (less about injuries, more about... You know, being crazy).
Understood. When Luke (because his agent undoubtedly is) ask the Panthers for the biggest contract in history of the NFL for a linebacker, you would franchise tag Luke, and then seek to trade or release him as he would represent too much cap being tied up in one player.