<h1>No.</h1>
<p>Substantive content should not be changed in someone else's answer.  Nor should editorial content be added.  People who disagree should leave comments, downvote, and/or post their own answer.  In their own answer, they can call out the other answer and explain what they disagree with and why.</p>
<p>At all times all parties should abide by SE's <a href="https://stats.stackexchange.com/help/be-nice">be nice</a> policy.  If you believe that is violated, or that someone is editing inappropriately, flag it for moderator attention.  Don't get involved in a flame war.</p>
