Of the examples, only Alonzo Mourning and John Salmons were in the past decade.
Mourning is a story we're all familiar with that has nothing to do with risk of a player not willing to play for us. He was nearly the twilight of his career and he'd just been traded to a team that was gutted. I myself would not want to go there. No one would.
John Salmons saw a better deal from the Kings and went for it. It's no different that Jordan changing his mind and not doing a trade. It ain't final until the man signs on the dotted line.
The BJ Armstrong situation is extremely unique, because likely the only reason Armstrong refused to come to the Raptors was because we're in Canada and we were an unknown at the time of the expansion. Let's face it even now there are Americans who think we live in igloos.