User blog comment:AYET/What to do with Doflamingo now/@comment-24769684-20150721161636

While it has been shown that Luffy doesn't kill his enemies because them living with their defeat is a much greater punishment, Doflamingo could be an exception. This is because of his strong desire to live. No matter how low he sinks, Doflamingo will look for any way to rise up again.

He's like a Sith Lord: if you can't show them that life is painful enough, death is the only option.

Or maybe they will take him to Impel Down Level 7!