I'm sure one will be along in a minute. Maybe they'll tell you it's not good forum etiquette to call someone an idiot for recommending you don't brick your NVR and then realise you needed their help to unbrick it later. Actually that's got nothing to do with forum etiquette, only a real idiot would do that.
http://www.webopedia.com/DidYouKnow/Internet/forum_etiquette.asp
Check out the following bits especially:
Do Stay On Topic. Many people use forums for knowledge gathering as well as social interactions. Forum posts and threads can be read by hundreds or thousands of users, and as such it's important to read the topic of a particular discussion and keep your posts related to that topic. If you are looking for general chat and comments, look in the forums for an off-topic discussion area. OK this one is optional around here but not when spamming multiple threads.
Don't Double Post. When using Internet forums it annoys other users when you post the same message more than once, in more than on discussion thread. If you make a post and no one replies, then leave it at that. Reposting the same message or slightly edited versions of the same message will not earn you any respect from other forum users, and in fact it may earn you warnings from the moderator.
Do Search Before Posting. Before posting a question or asking for help on a particular topic, do use the forum search option to make sure this question has not already been asked and answered by other users. Even if your question does not appear in the thread list, it may still be available as an archived topic in the forum.