I added Crewman Dax to this list. Dax was an enlisted man about the Enterprise-A. Lt. Valeris planted the magnetic (NOT gravity) boots that were used in the assasination of Chancellor Gorkon in his locker. (Star Trek VI The Undiscovered Country)
They ARE gravity boots, however. The Klingons call them "magnetic" boots in the trial. Spock, watching it, says "Gravity boots?" under his breath. Later, when asked what they are looking for, Lt. Valeris says, "Two pairs of gravity boots."
--Pcj 12:52, 17 June 2006 (UTC)