Mashed Potatoes

So i've just finished prepping several dozen very large Russet potatoes for tonights dinner service. A few of them were showing a bright green just beneath the skin which got me to thinking, as of course I wasn't thinking while performing the mindless task of potato peeling. Anyways, I had heard that this "green" in the potato was poisonous so with a quick net search this is what I found. It is poisonous, even in small quantities. With the "at risk" population I cook for the potatoes have been discarded and everyone will sleep soundly tonight!