Block
On a profile choose Block. They cannot send you a friend request or DM you. The list is User Settings → Blocked Users. From there: Unblock, View Profile, copy AstralTag, copy user ID.
A block does not remove them from shared communities and does not hide your old messages there.
Who can write and call
User Settings → Privacy Dashboard
Connections
- Who can send friend requests: Everyone / Friends of Friends / Community Members.
- Allow direct messages from community members is the default for *new* communities. For ones you already joined, Astral asks: allow all, block all, or skip. Per community: right-click the name → Privacy Settings.
- Hide last online time — when you are offline, others only see that you were online recently.
Communication
- Incoming calls: Nobody / Friends Only (recommended) / Friends + Custom / Everyone.
- If calls are not fully off: Receive calls without sound — non-friends already stay silent.
- Who can add you to groups: the same four levels. Someone can still send a group invite link by hand.
Data export and deletion: Exporting your account data, Requesting data deletion.