But why? At that point I might as well turn off the feature...I can't know everyone who will try to get in touch with me while I'm out of the office. If I could

But why? At that point I might as well turn off the feature...I can't know everyone who will try to get in touch with me while I'm out of the office. If I could, I'd just tell those people ahead of time. If someone tries to reach me for something unanticipated and I've never responded to them before, they won't receive a notification. This "threat" is a fugazzi. Honestly I can't believe this hit the front page of HN. What a ridiculous "security risk."