The new search function at the top of the StarCraft II community site is extremely robust. Please be sure to use it to look for similar topics, blog posts, or web pages that may contain the answer before creating your forum topic. Making a new thread on an existing subject will likely result in your thread being deleted. If you continue to repost it you're likely to have your posting privileges suspended for spamming. Worst of all, you'll be making the other forum goers upset that you didn't take a minute to search before posting.
The new rating system can be used to promote positive discussion, and demote unhelpful posts, or even report posts that violate the forum code of conduct. By hovering over a post you'll be presented with a thumbs up, and a thumbs down icon. Clicking the 'thumbs down' icon you can choose from a few options. Dislike will rate the comment down. If enough people dislike a post it will be darkened, or with a lot of dislikes it will be hidden. You can also quickly report a post as trolling or spam, or use the report function to fill out a more comprehensive description of the violation. You can only rate each post once. Use it wisely to help foster a positive and helpful forum community.
In addition to the Forum Code of Conduct, here are some common courtesy guidelines to follow. While these do technically fall within the bounds of the Code of Conduct, these cover more specific examples of common errors that will lead to thread deletions or posting privileges being revoked.
The StarCraft II forums are for discussion of topics directly related to StarCraft II
The forums here are specifically to discuss the game and related topics. Any topics not related to StarCraft II, Battle.net or Blizzard are subject to deletion.
Don't post in all capital letters, use a misleading title, excessive punctuation, non-standard symbols, etc.
While everyone wants their posts read, we ask you to refrain from using these types of tactics in order to bring more people to your thread. Let your post stand on its own merit. Threads violating this guideline are subject to deletion.
Using the words Blizzard, Blue, or any community team members name in a thread topic is frowned upon
Everyone would like Blizzard to read and acknowledge his or her post, and we understand that. However, use of such words in the topic does not help that come to pass. Please make your thread title relevant to the post subject. Threads violating this guideline are subject to deletion.
Posting "First" or IBTL constitutes as spamming
You will be suspended if you create a post that is intended to call out that you achieved a specific reply number in a thread. This is considered spamming. Posting IBTL (in before the lock) is not helpful and if you feel a thread should be moderated please use the rating button to do so.
Do not bump posts
The act of posting simply to bump a thread is considered spamming. This also includes bumping very old threads for no reason (called 'necro bumping' or 'necroing').
Petition posts are frowned upon
These are discussion forums, and as such we ask that you hold discussions. Creating a thread to ask for replies as votes is not a discussion. Threads violating this guideline are subject to deletion.
Do not post about locked or deleted threads
Posts that are moderated have a reason behind the moderation. It's up to you to read the forum code of conduct and these guidelines to determine what you did wrong, learn from your mistake, and attempt to post again without breaking any rules.