No griefing.
Do not destroy, alter, sabotage, or interfere with another player's builds, land, infrastructure, or property without permission.
SERVER RULES
Keep it simple.
Don't ruin the world.
These are the practical rules players need for normal gameplay. The full Constitution covers server governance and legal structure separately.
No stealing.
If it is not yours, do not take it. This includes items, resources, shop stock, containers, animals, and other player-owned property.
No hacks or exploits.
No hacked clients, x-ray, dupes, exploit abuse, unfair automation, or other methods that give you an illegitimate advantage.
Don't be a nuisance.
Trash talk is part of the server, but targeted harassment, repeated disruption, spam, or intentionally making the game miserable for others can still cross the line.
Respect claims and towns.
Towny land, private property, shops, and local rules should be respected. If you are in someone's territory, understand what applies there.
PvP is opt-in.
Use duels, arenas, or other agreed-upon combat. Do not use PvP as an excuse to harass players who are not looking for a fight.
Don't bypass server systems.
Do not intentionally evade punishments, claim protections, economy rules, anti-cheat, or other systems designed to keep the server functional.
Use common sense.
If something is obviously destructive, abusive, or designed to exploit a loophole, do not assume it is allowed just because it is not written here word-for-word.
DEEPER SERVER LAW
There is also a Constitution.
The Constitution covers territorial governments, ownership, protected rights, offenses, penalties, and the Central Government. Most players will not need it day-to-day, but it remains the full governing document.