As most of you know, Sun and Moon are coming out soon. (or already out, if you're reading this in the future) (and that rhymed) Usually, new Pokemon games means new users. If we want them to stay, it would probably be a good idea to make sure they're familiar with the rules BEFORE they get perma-banned. As most of you also know, new users tend not to read the rules. Even if they take two minutes to read all the bold sentences, they usually forget everything in the two following minutes. Then, when their posts get rejected, they start thinking this site sucks and leave. So if you want this community to get bigger, you should probably give reasons for hiding or rejecting posts, or at least change the "your post was hidden" message to remind people to read the rules.
Edit: People are saying that writing a response every time would be too much work, so we should probably just have a short list of responses to choose from, such as "Opinion questions are not allowed" or "Questions about in-game teams are not allowed".