I think many, many viewers could relate to this conspiracy photo very easily.
I like how you used the mirror, good angle. One thing I like to see in photos is having the subject slightly off-centered in the shot as it lends a bit more interest to the eyes. I find the pump hose a little distracting and I might have cropped in a bit tighter, say on the right (which would have placed the focus of your shot off center).
Good lighting and the solid, vibrant colors work well also. It's one of those photos where you just look, nod in agreement and wonder who those "conspiraotrs" are. In other words, you effectively and quickly communicated your message to the viewer. No tilting the head and trying to figure out what the photographer was trying to say. Nicely done.
Funny title, and great idea to do it through the rearview mirror. I wish the sides of the mirror were more in focus - I suppose it was hard to get both the reflection and the mirror itself in focus?