Add statement about "good scientific practices"

README.md

@@ -322,6 +322,9 @@ y_data[x_data >= 2] = 4
 y_data += np.random.normal(0, 0.3, len(y_data))
 ```
 
+**Important: Forging data, manipulating data or copying from others is a clear
+violation of "good scientific practices". Violations will have consequences.**
+
 Finally, we can add this to our plot. Since our data points are subject to
 statistical fluctuations, we would like to use matplotlib's `errorbar` method,
 which draws our data points as dots with error bars.