Originally Posted by wogoga
First off, I'm not arguing that photons do not interact. I'm arguing that the interaction which exists (and which we understand) cannot account for what you want it to do.
Secondly, in regards to aligning their propagation direction, we know that this cannot happen because it would violate momentum and/or energy conservation.
Quite so. But again, the fact that they interact (weakly) doesn't mean that they interact the way that you want them to. They do not.