Where DID I leave my car/tank/spidertron/other modded vehicle? This mod adds a tool-belt icon to help you track it down.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Could you add Companions to ignored list https://mods.factorio.com/mod/Companion_Drones they cannot be used by drivers/passenger.
Or an even better idea: add configurable map/player field in settings with entities name/id for an ignoring list.
Already exists. Look in Settings > Mod Settings > "Per player" tab. There's a "Hide vehicles from results" setting. Hover over it for instructions on how to figure out the internal entity name.