To situational? this will work on pretty much every boss. If the fight already been goin for say 50% theres little chance the DPS will the able to overtake the tank + everyone has a mechanic to lower/remove threat, think of Feigndeath/invis/vanish then there is veint/fade/salv
cant check this if its working but i gues its highly bannable, Bliz is able to check macros + why would anyone ever cast/open the Gbank in the middle of the fight other then to obviously exploit.
edit: also if you get caught in the act theres a 99% chance loot/chieves will be removed from you and your fellow raid members that attended the kill.