What about Thread.destroy?

Thread.destroy has never been implemented. If it were implemented, it would be deadlock prone in the manner of Thread.suspend. (In fact, it is roughly equivalent to Thread.suspend without the possibility of a subsequent Thread.resume.) We are not implementing it at this time, but neither are we deprecating it (forestalling its implementation in future). Although it would certainly be deadlock prone, it has been argued that there may be circumstances when a program is willing to risk a deadlock rather than to exit outright.