One of the most ridiculous things about their beliefs IMO is how they change them to suit a certain set of circumstances, and they become even more ridiculous than they were before
Up to 1995: "The generation that saw the events of 1914 would be alive at the end"
1995 onwards: "Ooops, most of the 1914 generation are dead, it must be any generation that reject the "truth" according to the watchtower that will be alive at the end"
Up to 2007:The anointed were all gathered by 1935, except for replacements : "Ermmm well, they should be decreasing in numbers, but they are increasing. What to do? Ah, the gathering isn't complete after all, they are still being gathered. That's why the number of partakers keeps rising"
I imagine there will be more "new light" shining as time goes on.