diff --git a/docs/UserGuide.md b/docs/UserGuide.md
index 7517c463f2..fc91990812 100644
--- a/docs/UserGuide.md
+++ b/docs/UserGuide.md
@@ -25,6 +25,9 @@ Don’t let another special occasion slip by uncelebrated. Sign up for 'Flirt an
 5. Type the command in the command box and press Enter to execute it.
 6. Refer to the [Features](#Features) section below for an overview of all valid commands.
 
+# Warning
+Do NOT manually tamper with the .txt files in the data folder - `Flirt and Fork` will refuse to cooperate with you if you choose to violate this rule.
+
 ## Features 
 
 This section provides an overview of the available commands in the application, grouped by their functionality. Detailed usage instructions for each command can be found in the [Usage](#Usage) section.