I would like to temporary remove elite and locked crates.
Basically, while plugin is running, there's no single elite crate in server, also no lockedcrates in oil rigs.

You can block crate_elite.prefab with ComponentBlocker.

The locked codelockedhackablecrate.prefab is a bit trickier. Try using ZoneManager to make a small zone, maybe radius 5, where the code lock crate spawns on oil rig, and set the nolootspawns flag to true.

All crates can be removed as mentioned above, with prefabs.