Combat and raiding

• PvP anywhere on the map
• Base raiding
• Griefing and stealing
• Player traps
• Spawn camping - keep it reasonable

Social

• Clans, teams, and alliances
• Betraying teammates / starting wars
• Scamming players out of in-game items

Mechanics

• Bliss gem and life mechanics - use them however you want

Cheats and hacked clients

• Kill aura
• Reach
• Fly hacks
• Speed hacks
• X-ray
• Auto crystal / combat cheats
• Macros or scripts that give an unfair advantage in combat or mining
• Packet abuse, ghost hand, phase, or similar client exploits

Exploits

• Item duplication
• Abusing bugs to crash the server
• Lag machines
• Chunk bans / intentional server corruption
• Any exploit that makes the server unplayable for everyone else

Real-life stuff

• Doxxing or leaking personal information
• IRL threats
• Hacking accounts or stealing logins
• DDoS threats or attacks on the server
• Scamming for real money or account theft