>Yesterday I asked something very similar: will photons communicate if
>they are on the opposite sides of Earth (or Sun).

Presumably, yes, the matter between the two would be irrelevant., I think.

>To isolate, I would try throwing one of the photons in a Black Hole.

That would be a fascinating experiment!  It would be a way to probe the

nature of a black hole.  Generate a stream of entangled photons, throw 

one pair of each into a black hole, and at a varying delay, and see what

the detection shows.  One problem might be that the photon thrown into

the black hole can never be 'detected', at least by conventional means.

Would there be a detectable result?  Or just random?

>Or "destroy" one of them, but this is close to cheating.

"Destroying" them would be akin to "detecting" them, I suspect, although

 without actually taking measurements of the results.

            Jim Bell