Script is broken for prefabs, workaround: how do I make it read only?

I have a script that generates and places objects
If the user increases or decreases the number of objects in the editor, which is fine for editing, then it works fine. If it has been turned into a prefab, all hell breaks loose.


The best solution, for now, is to make it read-only. so I have that question also:

How do I make a read-only prefab? Or more specifically would I make a field dynamically rendered as a Read Only Field conditional to its being in the Editor and it's a Prefab. (not in run mode)?

 

Aha, Found the answer to the latter question: Here it is:
public override void OnInspectorGUI()
{
SomeClass flower = target as SomeClass ;

if (PrefabUtility.GetPrefabAssetType(target) == PrefabAssetType.NotAPrefab)
{
base.OnInspectorGUI();
}
else
{
MonoScript script = MonoScript.FromMonoBehaviour(target as MonoBehaviour);
EditorGUI.BeginDisabledGroup(true);
EditorGUILayout.ObjectField("Script", script, typeof(MonoScript), false);
EditorGUI.EndDisabledGroup();
}
}