Open dialog is a major potential benefit of using preprints, and it can help authors, readers, reviewers, and others in a variety of ways.
In order to mitigate the potential effects of unprofessional commentary, many servers moderate their comment sections. However, all stakeholders, including authors and readers, can play a role in encouraging constructive commentary. We recommend following the FAST (Focused, Appropriate, Specific, Transparent) principles. For more, see our FAQ on public preprint feedback.