Was thinking about this today! What we need to come up with is something like Crazies 586/7 list from watchtower sources showing the kings list. Then next time they have a prophecy watchtower study we could all go to different halls where no one would know us and have a prepared answer typed up with watchtowerese language something like;
"People in the world try to make these simple bible prophecies so complicated when jehovah's spirit has made their fulfillment clearly manifest to his faithful and discreet slave... As the watchtower has clearly brought out there were 6 kings that ruled from the date of 539 Nabonidus: (17 Years) Labashi-Marduk: (9 Months) Ne riglissar: (4 Years) Evil-merodach: (2 Years) N ebuchadnezzar: (43 Years) Nebuchadnezzar’s 18 regnal year so a little simple math and we come up with a clear date for the destruction of Jerusalem of 587/586 BCE to which we add 2521 years and we can see that Jesus return to kingly power was in the year 1935..."
Then just stand up and leave... Of course we would have to pair it down a bit but I think if we threw some more watchtowerese into it we could get a lot of people to think! What we could do is dress the part and act like Mr/Mrs spiritual and before we get to that paragraph throw in some "real" comments so that everyone there would just be so impressed with us... But the good thing would be if we had this answer prepared then when we got to paragraph 15 (or 10, or 16 or whatever) and we started in with this most people would be listening and they wouldn't even see it coming!
I told those bastards to leave me alone...