The forum rules still do apply here. The moderation is looser, the allowed subject matter is broader. For instance, you can post stuff here you can't in the health forum, but if you tell someone to inject a bleach solution, or call them an idiot for not doing it, your post is still getting removed at the very least.
Think of this forum as being an after work pub. The formalities of the office are no longer there, but basic standards of decent behaviour are still expected.
And yes, flat earth, hollow earth, alien overlords, and similar subjects are welcome here.