I have recently decided to add in a few minor server rules. These will only be posted in the update log, as players will only be able to access the server from Planet Minecraft officially for updates and changes.

1. Mind your language. You're allowed to swear and such, but excessive swearing using inappropriate words which could be used to offend somebody's sex, race, gender, etc. are no longer allowed. This includes racial slurs and anything related to Nazis.
2. Toxicity. You're allowed to disrespect other members of the community if you find it to be necessary, but do not excessively show disrespect towards other members of the community. The general summary is that you should not act excessively toxic.
3. Hacking. Hacking is the only rule which was previously added, and it's basically any client which provides an unfair advantage to other players. Clients for PVP and general modifications (such as BadLion, Optifine, Shaders) are allowed. Using any type of client to attempt to crash the server will result in a permanent ban.
4. Lag machines. Lag machines' intentions are to cause the server to slow down, which generally will ruin the experience for any other players on the server. As a result, lag machines are not allowed. If players report to me, Gwiilo, that lag machines are being used by any players to slow the server down or to have any type of negative impact, that player will be permanently banned.
5. General rule-breaking. If a player is doing anything which I, Gwiilo, find to be breaking the rules, they will receive the appropriate punishments. Making walls of cobblestone around spawn is fine as an example, but if you were to repeatedly make swastika structures out of any block, you will likely receive a warning as an example.

This rule list will be implemented in-game with a plugin I am currently working on. I'm not the best at making plugins, but I'm sure that I'll be able to add it in, like I added the previous plugins :)