It used to be off by default, they changed it to on recently, I don't know if they will change it back. It was annoying me a little but not enough to do anything about it (luckily don't add employees that often), but since you posted this I thought I would try to fix it for fun. Just uses a browser extension and a little JavaScript, I doubt toast would want me posting instructions here and advocating that people do this, but just thought I would share that it is possible.
