If you have a thought that can't be worked into any likely conversation, here's were you post it.
For instance, it just occurred to me that if I found myself travelling back in time, I'd tell nothing but ridiculous lies about the future. I just wouldn't be able to help myself.
"Oh, the Atom Bomb? Well, I guess I wouldn't like it if someone dropped one on my town, but these days we're more worried about Eros Engines. Scientists figured out to extract pure love from baby booties, and used it to construct a device that makes the Hydrogen Bomb look like a firecracker. The mad, arrogant fools!"