It would be more accurate to say that in a situation where there is a deficiency of future absorption in a particular spatial direction, there will be a corresponding decrease in emission in that direction towards the future. There is always a past absorber in the Big Bang Universe in any spatial direction. In spatial directions where the radiation is reduced towards the future, the radiation towards the past is increased.
In the experimental attempt to detect advanced radiation in the late 70s (published in 1980), Schmidt and Newman used a half-wave dipole as an instrument of observation: "A search for advanced fields in electromagnetic radiation". With this, they introduced a future absorber in the spatial direction in which they tried to detect advanced radiation. So in that spatial direction they increased the radiation towards the future and reduced the radiation towards the past (figure 3), therefore it is no wonder that they had a negative result.



I made the same mistake in the first attempt to replicate their experiment. I almost gave up after numerous failed attempts. Then, after I read the paper: "Radiated power and radiation reaction forces of coherently oscillating charged particles in classical electrodynamics" I decided to replace the half-wave dipole with a lambda / 20 receiving antenna, which is a much more inefficient absorber, and positive results began to appear almost immediately: "Measurement of advanced electromagnetic radiation".

Hi,
Cramer’s proposal cannot work for EM waves, simply because the early universe was not transparent to EM radiation. Advanced electromagnetic waves, traveling backward in time, can reach some 380,000 years after the Big Bang and therefore can’t be reflected at the Big Bang boundary. Instead of that, they should interact with the ordinary dense matter, at least 380,000 years old, as shown in Figure 2 from my recent paper on the problem of the direction of the electromagnetic arrow of time: http://philsci-archive.pitt.edu/13505



This interaction would seem to us like retarded EM radiation coming about 380,000 years after the Big Bang, although it is actually 1/2 advanced + 1/2 retarded EM radiation.