Okay that makes sense, but isn't it possible to make this optional? It's not that I don't trust you in particular, but there have been a little too many leaks for me to trust anyone with my full contact list. They don't need to get spammed some day because I signed up for an alternative RSS reader and they happened to get hacked or whatever.

I don't share things by e-mail anyway; if I wanna tell anyone about something I've read I mostly use Google+ or MSN. That's why I ask if it could be made optional (you'd be the first that I know to do this, but that'd make it that much more awesome!).