As someone who is always invisible, and likes her privacy... This feature is a nightmare for me.
It has already caused problems such as revealing the existence of my smaller, private servers to people who weren't meant to know about them. Nothing malicious, but sometimes you don't want to hang out with ALL of your friends and you want to go somewhere quieter for a bit. Now that's been ousted, and feelings are hurt after having this smaller server for over a year.
I don't necessarily want everyone knowing where I am and what I'm doing at all times. Again, I am always appearing offline because I like my privacy.
Now, I don't have control of my privacy and I am very unhappy about it.
We need an opt out for this, it's causing more harm than good.