Maybe this is too specific and even unnecessary, but I thought I'd start a discussion anyway.
We should consider adding a rule about Point-Farming.
Specifically, we should add a rule about point-farming during parts of a map when humans should be focused on shooting a boss/objective.
Lately, I've heard a lot of complaints about players trying to point-farm by focusing on shooting zombies during boss fights, even when zombies are not able to chase the humans.
Zombies are usually held back in a separate area that has no path to the humans or are held in a cage while the humans have to fight the boss. There is no actual reason to be shooting zombies during this point other than point-farming.
Multiple times, even during events, I have witnessed this point-farming going on. It usually isn't a big deal because a leader or an admin will tell people to stop and that's that. Sometimes people are still greedy and continue to do it, causing humans to have to go out of their way to single-out players that are engaged in this behaviour and calling them out by name hoping to publicly shame them into stopping. This takes away more effort that should be focused on a boss/objective. Sometimes it doesn't make a difference, but more often than not, if all the humans aren't focused on shooting the boss, we will lose the fight and it causes us to repeat the same stage which in turn causes frustration and monotony which lead to people getting tired of the event or even leaving the server altogether.
The thing is, there currently isn't a rule against this, so technically there's nothing preventing these people from continuing to point-farm when they should be helping the humans defeat the boss/objective. I could possibly see this fall under "No team killing / griefing" or "Teamwork is required" which are both already part of the server rules, but that's a bit of a stretch.
So, without an explicit rule, admins and players are left without the proper tool to actually enforce what they're saying.
If it did become a rule, I wouldn't expect it to result in any major punishments, as like I said, most people already listen with a simple warning even without it being punishable.