Here are some other issues which have been discussed in the past. I'll try to add any others that come up.

Quotes
If you are going to quote an external source, use quote marks/inverted commas. If you are taking information from another site you can add a hot link to the site (see markup info). There is a discussion on the subject at: http://wordsmith.org/board/showthreaded.pl?Cat=&Board=announcements&Number=16546

Length of threads
It appears to have been agreed that threads should not get longer than 99 posts. At this length, those with slower computers (some, I believe, wind powered) or slower connections start to growl. The remedy is to start a new thread, refering back to the old one. For example, if the old thread was called "everything you ever wanted to know about socks", the new thread could be called "socks revisited" or "socks part II" or anything you like. Ideally provide a note at the end of the old thread to say where it has gone and, if you can manage it, a hyperlink, to make it easy to find (see previous notes on making hot links). You don't have to be an ancient member of the group, anyone can set up a new follow-on thread.

Tone of Posts
E-mail is a fairly blunt medium and some of us try quite hard (at least some of the time) to pose questions thoughtfully without too much unkindness. There are a few running jokes, as you may find in any group, where conflict appears to surface but soon disappears when it turns out that there is no real animosity. From time to time there are real differences of opinion, as is inevitable in a group open to the whole world. Sometimes voices are raised. We have tried quite hard to make this group not just another place on the internet where people hurl abuse at each other, so if you want to call people names, rather than use persuasion to challenge their ideas, then you might prefer another, more combative group. This board is primarily about words, so there is plenty of scope for discussion of ideas and culture linked to our main topic.

Here are some thoughts that were posted some time ago by one of our members during one of our regular discussions about behaviour. As you can see, we all feel quite strongly about behaviour on this site:

1. Everyone is welcome here, whether they are really expert in the English language or struggling with it.
2. Every member has an obligation to make newcomers welcome and to assist them if they ask for help on a linguistic point. We have a special obligation to assist young people and those who speak English as a second language.
3. Fresh members and fresh ideas and viewpoints are not only welcome, but necessary if we are not to become a snooty inbred clique. Nothing is expected of new members except a desire to ask a question, or to join in on our discussions and cyberlife to whatever extent they may want or be able to, observing the common rules of courtesy and responsible conduct.
4. Except for Anu Garg, our esteemed founder, we have no officers, no one with any authority over other members. The titles we bear confer no special status and are linked only to the number of times we have posted, which is mostly a matter of simple longevity and ample leisure time. No one is expected to show any deference to any other member simply on the basis of his/her title. Those who are worthy of some degree of respect and deference due to their demonstrated knowledge and wisdom reveal themselves to anyone who sticks around for very long.
5. Our interests and discussions are wide and far ranging. There are categories for postings to be placed in, and we will try to make use of them, but there is some overlap and some subjects do not fit well in the categories, so there should be no criticism of anyone's choice of category.
6. We do not expect or desire to entertain discussions of religion, politics, ethical or moral questions as such. This is not the place for proselytizing, preaching, or trying to argue partisan positions. But quotations or references from scriptural, religious, political etc. sources are acceptable as literature or to illustrate a point in a discussion.
7. Given the number of posts which have built up (due to the popularity of this board), no one can be expected to search thru all, or many of them. It is therefore to be expected that new members will ask questions that have been asked before, or initiate a subject which has been discussed before (what old timers call a YART). It may be useful to gently and politely let that person know that this is covered in old postings, and advise how to find them; but this is only as a matter of helping them out, not to criticise them for doing something heinous.
8. Language which is not suitable for everyone will from time to time be used. We are not prudish and do not attempt to censor anyone. However, all should bear in mind that we have members who do not appreciate scatological language and we also have members (and highly valued ones) who are 14 or even 10 years old.
9. A member, or newcomer, can make him/herself unwelcome by engaging in unnecessary bad language, rudeness to other members, getting personal in debate, introducing subjects not the purview of this board, or, in general, violating the rules of civilized discourse which ladies and gentlemen are expected to observe. We have no way of expelling anyone who becomes unwelcome; the only thing we can do is to admonish such a person, which must be done with the greatest caution and all possible good will, and only in a private message. If unwelcome conduct continues, we can only ignore the offender.
10. We do not tolerate plagiarism. An idea or expression not one's own should be identified by author and source, if known.