Contacts only option for who can message you, prevent block evasion from groups

[ian]

I urge you to check the existing threads, this is already known and documented:

Private Managed Groups

If you broadcast an invite link to your private DC group, anyone can later exploit further vulnerabilities: [undisclosed security issue about overtaking groups of others] adding a huge number of members adding a huge number of spam or bomb messages to the group either directly or through a constant stream of new members directly sending spam messages to each member (if you share a group with someone, you are free to message them) adding impersonated members to the group, perhaps even after pup…

If you found that my above workaround solved your issue at hand, feel free to click the Solution button on the comment.