The author of a message holds a copyright on it, as with all works of original authorship, under U.S. and international law. Fair Use Please identify yourself at the end of every message that you send to the list. It can be difficult to remember personal information about individual members even if they post regularly. Do not flame. Get together from time to time to renew the acquaintance.
Personal attacks distract and stunt communication among all list members.
This is also a good way to make new friends, instead of lifelong enemies. It does not always translate as funny among a large group of people that you have never met. Begin a new thread when you wish to discuss a new subject, and label each message in that thread with the same subject line. Most list members find this confusing, and some will take offense at the abrupt change, particularly if you use one of their postings. Do ask questions to clarify meaning, then state your own opinion, if it is different.