For some reason none of the items are being blocked in my list, I got the short names from here https://www.corrosionhour.com/rust-item-list/

Here is my config, nothing is being blocked from being placed outside of Building Privilege.

{
  "deployables": [
    "spikes.floor",
    "trap.landmine",
    "barricade.sandbags",
    "barricade.concrete",
    "barricade.metal",
    "autoturret",
    "barricade.woodwire",
    "barricade.wood",
    "guntrap",
    "barricade.stone",
    "watchtower.wood",
    "water.catcher.large",
    "water.catcher.small",
    "water.barrel",
    "samsite",
    "trap.bear"
  ]
}

The plugin does not seem to work whatsoever even after many reloads