A full list of forum rules can be found
here, but the most important ones are listed below and breaking them will likely lead to an
immediate ban:
You might want to consider including the permanent or temporary label for each of the mentioned cases (to eliminate/reduce the possibility of them creating threads for "perma" cases).
Please suggest anything you think should be included.
[Guide] Bitcointalk account security (the other linked guide, covers only a small portion of it).
My suggestion would be to either send it in parts, or send the same message again as a reminder once the user has made a few posts.
Would prefer it being shown as they sign up because most won't bother reading it but it could also be sticked and they're just forced to read it. Could also get sent to their email and/or pop up in their messages as well.
I like these (perhaps once a week until they reach a rank of Jr.).