Subject: Why don’t photons collide, interfere or react with one another?

At any given moment, in any given subatomic volume of space in our environment 
that is not occupied by a physical object, countless photons converge that 
have emanated from every point of every angle of every inclination surrounding 
that speck of space. Yet, infinite numbers of photons stream through the speck 
in every direction and continue on their way only to past through infinite 
numbers of identical convergence’s with countless other photons in infinite 
numbers of identical minute volumes of space.  

Why don’t photons collide, interfere or react with one another? 

Re: Why don’t photons collide, interfere or react with one another?