Alright it's simple:

1.  Don't be rude.
2. Don't spew slurs and hate.
3. Keep it on topic with the game - anything else is out, including  low effort "joke" posts.
4. Don't mind using grammar or not, but keep the post readable by human eyes. Don't use special fonts.
5. Have common sense.
6. Any post deemed to break the rules will be deleted. This decision is final and chosen by the admins.