Not quite sure how to word the title, but, I've seen way too many new users/ old users that have just come back to the forum who are oblivious to the rules and don't bother to read them before posting which leads to infractions/warnings. I think when a user makes an account/ first logs onto the forum/ first logs onto the forum in a month should have to go through something like a 'license agreement'/ popup that gives links to all the board rules. So basically just making the user agree to the rules before allowing them onto the forum.

You are suggesting something people skim by and agree on just to get rid of it.
-not supported seeing as its additional work and people will probably get mad about it.

I knew someone would say that, but, I think it will at least stop a percentage of users making useless threads and posts

Well for a game forum for people of all ages, the younger audience may not see what these threads are and simply ignore them since they are not directly infront of them. Basically like a tutorial, teaching you the basics. Your criticisms are fine though since they all have a logical explanation.