Stretching the "word origins" platform to its most tenebrous limits, I've got to raise a public plea:
Please stop using "drank the Kool-Aid" to mean "agreed to corporate policy" or whatever.
You're maligning the Kool-Aid brand, which had nothing to do with the Jonestown mass suicide: that was Flavor-Aid. When you use "drank the Kool-Aid" to sound hip and edgy, you only sound ignorant to people who know better.
Sorry for lashing out. I'm just tired of hearing people who should know better--you know, like, guests on NPR or whatever--perpetuating this mistaken and libelous phrase.