If anyone wants to see a kind of pointless, somewhat technical, but fun nonetheless debate on physics, the scientific method, and the mass of photons (complete with equations being thrown around) then go here:
It's the discussion page on Wikipedia's article on "Time travel". Scroll down to the main heading #8 "Distances in time travel". I'm "Capitalist" over there too.
EDIT: Between the discussions over there and over here, I'll never get anything done, LOL!