It's an exploit regardless. The point is not - whether or not it would be ethical to use in a raid, but rather to show this exploit to people, and have them decide on whether or not they want to go through the hassle of summoning and getting some time off of the buff. I know (and there are other people that have had this happen) that I would have LOVED this buff on certain bosses, whether it has a soft enrage or hard enrage timer; having that little more 30-45sec of damage output would prevent a wipe when the boss enrages and wipes the raid with 1% left.