Add more hints

README.md

@@ -197,6 +197,11 @@ on_...:
 ```
 
 ### Action: Security Pin
+
+> [!IMPORTANT]  
+> Overriding the security PIN will save it to flash!  
+> To revert back to the PIN defined in your YAML configuration, you must set the override PIN to `0`.
+
 To override the security pin without recompiling, use the following action:
 ```yaml
 on_...:
@@ -257,6 +262,11 @@ context:
 
 ## Entities
 
+> [!IMPORTANT]  
+> Most settings entities **require the security PIN** to make changes.  
+> Without the PIN, modifying these settings is not possible.  
+> Additionally, the `Last Unlock User` feature will only function if events are enabled!  
+
 **Lock:**  
 - Lock