Basically a addon that restricts how many vehicles or Bots a player can have.
This prevents people on freebuilds or fortwars to have 10 vehicles and have them complain about the physics vehicle limit being hit.
/Set PVehicleLimit 2(Or whatever number)
/PVehicle Limit Off
/PVehicle Limit On
/PBot Limit 4(Or Whatever Number)
/PBot Limit Off
/PBot Limit On
And even better RTB prefs if possible.
also there is no reason this isn't possible in Blockland.