If you want to avoid blocking someone on Steam in the first place, here are a few tips to help you manage your interactions with others:
Once you've unblocked someone on Steam, they will no longer be blocked from contacting you or seeing your online status. Keep in mind that unblocking someone does not automatically add them as a friend. how do i unblock someone on steam
Navigate to your Steam Discussions profile page or hover over your persona name at the top of the client and select . If you want to avoid blocking someone on