For a short period of time, I need to make it so some of my friends can't see what games I'm playing on Steam. I've seen some threads about this "Block all communications" feature and while some say it only makes it so you don't receive messages you get from them, others say it also makes you appear offline to blocked users, thus they're not able to see you playing. So I have a few questions.
Does it really make you appear offline so that friends can't see these pop-ups whenever I start playing a game? Also, is there a notification that tells them I have blocked them?