Currently, total structure ownership is shared among the clan. All members can dismantle anything, take anything, build anywhere, and enter any door.
This is problematic, as there is a huge griefing potential surrounding structure ownership.
The issue might be resolved in a number of ways, but I’d like to suggest resolving it through adding a new ‘Private’ ownership option for structures. This option would enable players to build apart from their clans, and to retain their privately-built structures despite leaving or joining clans.
TL;DR: Buildings built by a players should belong to that player at first. The player can then choose to give the building to their clan. Clan leaders should also be able to choose to give clan buildings to players.
Griefing Examples under the current system
Clans have ‘stolen’ structures by assimilating players into their clans, only to kick the player who built the structure out after they have joined.
Clans can also be major victims of griefing, as any member of a clan can dismantle anything at any time.
‘Private’ or ‘Clan’ Permission Levels
All foundations should start as ‘Private’ when placed by a player, so long as they are not connected to an already-existing structure. Private structures cannot be opened by anybody aside from the player who built them. Private structures can be given to ‘Clan’ ownership by holding E over any part of them, and changing the ownership to Clan.
Structures can be set to ‘Clan’ ownership, so that any member of the clan may enter doors or take anything from inside. Although any clan member should be able to add to or repair a clan structure, only clan leaders or high-ranking members should be able to dismantle structures, or remove thralls.
Clan structures should also be able to be given back to clan members as ‘Private’ structures by the clan leader only.
Private structures share the claim radius of the clan that the player is currently in. This means that players may build their own Private structures immediately beside those belonging to their clan or their clanmates.
If, after leaving a clan or being kicked, a Private structure overlaps its claim radius with that of their previous Clan, the Private structure pieces that are overlapping the Clan’s claim radius should become immediately Ruined, allowing any player to dismantle the pieces. (Clan takes priority)
With Private structures, clanmates will gain the potential to have private holdings apart from their clan. They might construct private residences, filled with their own personal belongings, thralls, and decoratives. These buildings, when inspected, are shown as belonging to the individual, rather than the clan. In essence, this would give players ‘private space’.
Private structure owners would have control and ownership over their own buildings, preventing clanmates or even clan owners from meddling with their buildings.
This also enables clan leaders to build their own Private structures within clan walls, where they should store the most valuable items.