a less satisfying answer is that
a) it depends on what anarchist goals are and
b) who knows.
if the goal is a living situation where capitalism doesn't exist, not just in obvious ways, but also in subtle ones, then perhaps one could argue that by increasing the factors that people attend to (the effect of our actions on the rest of the world), people become acculturated to a different set of criteria for what is important.
but of course the counter argument (which is also true, and i would have to argue *more* true) is that capitalism is remarkable for its capacity to fold any solution into itself. which is what green consumerism (or any consumerism) does. the idea that we can solve the problems created by this system, *within* this system, is counter to my understanding of the depth of the problem/s.
that said though, i don't think anyone knows how to get from here to there. so to say anything is "in any way helpful"...
who knows what will change people's minds/actions. or if anything will.