True, but a skilled player who can normally get, say, 200+ bty before dying could simply have it macroed, so that if it becomes absolutely necessary they can ID out of there. Then they get another 200 bty, rinse and repeat until engine failure occurs. Since it is a percentage and not a certain number, they could keep failing every time for thousands of times, or not get any after 5000 tries. I agree with Mas to put a energy requirement;that way it will strictly be used for getting places rather than avoiding death.