Ok, this is something I noticed while playing through ME2 and I realized that the dark energy affecting Haestrom's star rung a bell somewhere in my head. I looked it up and found that Gianna Parasini mentions that there has been a increase in the purchase of dark energy and it might be something that might worry her superiors.
[quote: Page, Gianna Parasini, ME2 section "Gianna mentions that some people are interested in dark energy and whether it's something her superiors should be concerned about. This could possibly be linked to the star Dholen which was rapidly aging due to dark energy."]
Now considering the Rachni mentions that something soured the songs of their ancestor's during the rachni wars (which one can safely assume is the cause of the Reapers, the only ones with anything along the lines of mind control, aka indoctrination. also the fact the rachni say its the reapers), it seems that the reapers have their grubby little claws, paws, tenticles, or whatever they have in a lot more than we think.
[quote: Page, Rachni, ME2 section "The asari tells Shepard that the Queen believes Shepard is fighting the enemy who "soured the song of" the rachni."
It doesn't seem that far fetched to think that the reapers could be using indoctrinated servants of anonymous rich nature (not too unlike saren) to purchase mass quantities of Dark Energy to destabilize stars.