On the one hand, I see the benefit of trying to sow chaos but I always think blindsides work best when NO ONE knows they're coming. It's why they are called blindsides.
Hunter said he worked out the numbers and so if he figures Tiffany does play her idol and all the other votes were coming on him, all he had to do was play the idol and put whatever name he wanted down. Because the idol play would cancel the other votes and only his would likely count.
Now instead everyone knows he has the idol but some think he's bluffing, so they're likely still going to just split the votes between him and someone he didn't want out. So he still doesn't have control of that vote.