Rule for Jumpers are the same as Firearms..
Jumpers don't kill people who use them carelessly do. Control of the elevator is the key along with jumper awareness. You have got to KNOW what you are jumping, have total control of the elevator, and when leaving remove every jumper you have put on.
You can put tags, Jumper lists, timed jumpers, and all kinds of little things, but if you're going to use them you have to know what you're doing and keep up with them and go through your mental check list, before you leave that job, and remove everything.
Between the falls, crushing injuries, electrouction, this business is dangerous enough without having this crap occur..
I vividly remember, supervisors, who knew what they were doing, would immediately dismiss anyone caught breaking a jumper infraction. It's about pride in your trade..