Turrets and Sam Sites can still be destroyed when a player/clan is offline. Any way to change this?

If caused by turrets, then it means they are either using explosive or incen ammo, the plugin is not made for any other protection other than from another player. So let your players only use normal bullets in their turrets. As for SAM sites, they obviously set them too low, If in compunds, let them set it above roofs.

You can add them to the config like below but I would warn you.. Players could place industructable turrets in front of other players doors and such.. This could become toxic

"prefabs": [
"autoturret",
"samsite",
"door.hinged",
"door.double.hinged",
"window.bars",
"floor.ladder.hatch",
"floor.frame",
"wall.frame",
"shutter",
"wall.external",
"gates.external",
"box",
"locker"
]