Read carefully, a comma can make a difference:
1. RELEASE, NOT TO BE EXECUTED!
2. RELEASE NOT, TO BE EXECUTED!

A comma can make a difference btw life and death. So we need to carefully proofread/edit before we send messages

As you can see, the first sentence frees the convict, but the second condemns him to death. Yet the only difference in those statements is the placement of a comma.