My settings:
"AllowDemolishAfterServerRestart": false,
"AllowRotateAfterServerRestart": false,
"ClanCanDemolish": false,
"ClanCanRotate": false,
"DemolishTime": 1800.0,
"FriendsCanDemolish": false,
"FriendsCanRotate": false,
"MustOwnToDemolish": false,
"MustOwnToRotate": false,
"RepairDamageCooldown": 0.0,
"RotateTime": 1800.0

Tried with my own base. After 10 mins I was not able to demolish