As much as I like the idea of closing loopholes where this can happen, I don't think instakilling should be just a quick fix for this. I worry about some possibilies like: (1) those who don't take the lift off Kelethin, (2) monks taking a steep path off a cliff, (3) people running downward with levitate on, or (4) unfortunate GFlux victims. If you feel you can find a way to safely do this without murdering mass innocents, rock on, but I felt it's important to point this out.Client handles falling and jumping stuff (obviously). However I think I am going to add code to instakill anyone whose z axis value drops over a particular amount in a given period of time, now that I know people exploiting and not reporting it.