I spoke with my 93 year old grandmother that has a mind of a 55 year old about your theory. She would've been around 10 at the time of this suppposed "Plot" by the world's leaders to kill everyone. She told me that she clearly remembered everything that happened back than, but that they never even had vaccines for it.
I'll believe my sweet grandmother anyday over the opinions madmen, thank you. For those of you that have relatives in their late 80's or 90's and are about to join the ranks of those that have fallen victim to Schizophrenia around here, pick up the phone, folks. Ask them about the world affairs back in 1918. You'll be surprised to learn about just how much they know about what was going on back than, even if the majority of them were just kids at the time.
In the meantime, beware of all posts ending in ?!?!?!? or !!!!!'s. Might be a good sign about what's going on in the minds of your neighbors, if you know what I mean.