min, your modus operandi is the way to go if you're going to use the possibility of a change as a way to get a JW to think. In the end, when the rumor proved to be just that, no necks were exposed to be chopped.
But, if the rumor turned out to be true, you have the oppurtunity to create questions and doubts in the dubs you've already talked to.
It is good to be prepared...we just have to make sure we temper our expectations with a dose of skepticism...and reality.