Telamon wrote:

What is happening here is that the two waves of varying phase fall
upon

The EM waves will not interact with each other in space. Can you
imagine the chaos that would result on earth if this were to occur
with all the different EM waves at your location nothing would be
receivable. You can see this point right?

-You- miss the point, right?

From: http://en.wikipedia.org/wiki/Interference

Interference is the addition (superposition) of two or more waves
that results in a new wave pattern.

As most commonly used, the term interference usually refers to the
interaction of waves which are correlated or coherent with each
other, either because they come from the same source or because they
have the same or nearly the same frequency.

Please carefully re-read the part that says: "because they have the same
or nearly the same frequency".

So, yes, that is why we experience QRM (interference) on earth: because
*some* signals are at the same or nearly the same frequency and that is
why everything else doesn't interfere with everything else -- because
they are *different* frequencies. No antenna needed!