Open group, member deleting

Is there any way to CREATE a PUBLIC group, where members cannot delete themselves? Unfortunately I had this problem with a group of 40 people, where some trolls are deleting users from the group.

Maybe good or better, to be able to clone a chat, a group, with some modifications, or? All else would just cause further struggle.

(Deleting a member can also happen merely accidentally or just experimental. Maybe good to let effects be known before “Sure? All will be also informed that you have deleted the member X. Maybe just consider to create a new group and/or mute this one.”)

There are mailing lists, @adbenitez has made some