I agree with gary. avenues of diplomacy should be explored first, and if that fails the the good old fashioned blindfold and firing squad method can be employed :roll: .
Although concrete is a good idea too.
Keiths right hand man i believe you just have to be patient with some players. Theyll move on eventually, maybe theyll get a better offer? and then theyl be out of the way without having to resort to methods of killing first.