On the other hand &quot;Make doing the right things easy and the wrong things hard&quot; are good design rules. Putting something alive into a refrigerator and leaving it there, will probably make it dead. It might be a serious  mistake by the end user. The smart refrigerator of the future might want to double check; &quot;Are you sure you want to put the milk in the crib and the baby in the refrigerator?&quot;