Hello Gray_Lensman-san!

I assume you are a sci-fi buff.

The purpose is several fold.

Most of the forums you have to post on topic. If you post the wrong subject matter it will be moved and in some instances without a redirect attached it can be hard to find (normally we leaveout the redirect in the instances that the matter was rude).
The Entrance Hall you can post about anything from STW to RTW to Winning Strats to PC malfunctions. Just keep it PG as we have 10 to 80 year olds visiting.

The Entrance Hall is also a place to guide new forum users to the right place for help.

One of the reasons for posting restrictions is also to stop Trolls spamming the forums. Or people who are not interested in any aspect of the TW games debating gun control/abortion/creationsim vs evolution in the Backroom. There are a lot of griefers on the internet who tend to balk at posting restrictions at a far faster rate then TW strategists.

Overall the intent is to sift out trolls and help out our newest patrons.