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gwern comments on Particles break light-speed limit? - Less Wrong
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I think so; with any noticeable faster than C, can't you just ping-pong between paired receiver/emitters, gaining a little distance into the past with each ping-pong? (If you're only gaining a few nanoseconds with each cycle, might be expensive in equipment or energy, but for the right information from days/weeks in the future - like natural disaster warnings - it'd worth it, even ignoring hypercomputation issues.)
"Yeah, I only go a little into the past each time, but I make it up in volume!"
What's that a quote from? I'd just Google, but you changed a word or two, I think.
I doubt Silas was thinking of this, but it reminded me of SNL's "First Citiwide Change Bank" commercial.
I just made it up, trying to be silly. It's just an application of the standard "low margin, make it up on volume". It barely even makes sense as a joke, since the idea is actually sound (or at least not unsound on its face). If you can go any amount into the past, then you could, it seems, stack the process so that you go as far as you want into the past.
Go Mr. Parker!
I'll be honest, reading that link, that show sounds terrible.
I like it. They used difficult and expensive time travel to undo major catastrophes.