I'm still stunned to see the overwhelming amount of players who found this to be an incredibly difficult decision. I fully understand both sides of the debate, but it seems like everyone forgets that the Geth are machines. Sure, they're highly intelligent machines. I'll even give you that they are the closest thing to synthetic life in any science fiction I've had the pleasure of experienceing, but they are machines regardless.
To me, this throws away all questions of psychology and even morality to a certain degree. Think about when your computer begins to malfunction due to a registry error or a program not being prperly installed, and you download an update to fix the problem. Is that not "brainwashing" your computer? Are you not forcing your computer to behave the way you want it to? In my eyes, there's no difference. The Geth were built as tools to serve the Quarians in the first place.
But anyway, despite how anyone feels on the topic, its incredible that Mass Effect is able to get players into intellectual discussions about psychology and philosophy. I think we can all agree that Mass Effect is truly one of the great games of our era.