As you can see from the quotes below and many others, if you care to look, photons are usually reserved for visible light.
The term photon (meaning "visible-light particle") was coined for these energy packets.
from http://prasoondiwakar.com/wordpress/trivia/origin-of-word-photon
The word photon can be broken down to Greek word phōs, which means light. Phōs can also be related to Sanskrit word bhā or ābhā which means light.
When you discuss RF you usually don’t hear any discussion of photons, just the electromagnetic wave.
In any case they are all electromagnetic waves so any contention that RF does not have a magnetic component is just wrong
from http://www.universetoday.com/74027/what-are-photons/
Photons are basically the most visible portion of the electromagnetic spectrum.
from http://whatis.techtarget.com/definition/photon
The photon is the fundamental particle of visible light.
In some ways, visible light behaves like a wave phenomenon, but in other respects it acts like a stream of high-speed, submicroscopic particles. Isaac Newton was one of the first scientists to theorize that light consists of particles. Modern physicists have demonstrated that the energy in any electromagnetic field is made up of discrete packets. The term photon (meaning "visible-light particle") was coined for these energy packets.
photon[foh-ton]
noun1.a quantum of electromagnetic radiation,
A photon is an elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light, and the force carrier for the electromagnetic force
As always, it is interesting to see how some twist the science to suit their needs. In this case, latching onto the nonmagnetic nature of photons to justify a position while ignoring the fact that it is also an electromagnetic wave. I apologize to those who are more interested in the end result than the science behind it.