1. The Golden Rule: Treat those by which you wish to be treated.
2. Spam: Don't. You will receive one warning before a 3-day ban will be put in place if the warning is not followed.
3. Godmoding: Don't. Same as the spam rule, one warning and if that is not heeded then a ban will be put in place.
4. Double Posting: Don't (Unless the topic is a solo obviously). Not really ban-worthy, but continued offenses will result in a penalty.
5. Posting Order: Unless the topic is a sitewide or has a very large number of posters, there should usually be a posting order. Topics can also be specified to not have a posting order as well.
6. Character Limit: There isn't any! However, you will have to buy character slots after using your first two free ones.
7. Cursing/Adult Content: Don't go overboard. Be tasteful with it. This is a franchise centered towards kids, after all.