https://www.eff.org/deeplinks/2013/10/online-anonymity-not-o...
Another good example is from http://phinished.org/faq.php?faq=vb_read_and_post#faq_zoints...
"The anonymous posting option should be used sparingly. Please use it only when you have a matter of a highly personal or sensitive nature to discuss, or when you need to protect the privacy of colleagues, students, friends, or family members. It should never be used as cover to criticize or attack other users, as a means to evade social responsibility for one's comments, or as a way to avoid minor embarrassment on the boards. Anonymous posts may not contain attachments, and they cannot be edited after posting without revealing the username of the author. If you want to maintain your anonymity, do not attempt to edit an anonymous post.
The webmaster reserves the right to suspend or revoke the ability to post anonymously of any member who abuses the anonymous posting privilege. For more information, please see our acceptable use policy and privacy statement."