I've noticed myself that when donors team up they can pretty much hold off the zombies for the entire time limit or just prevent the zombies from doing anything. I think zombies should get some sort of strength buff or regen to allow them to not be spawn killed as easily.
Zombies are already invulnerable for five seconds after they spawn. This shouldn't be a problem once I get p3 ;)
Neutral I don't this this will solve the problem... It's not enough when 3 zombies are getting mobbed by groups of SpawnKillers. Not a bad idea, but wouldn't the Spawnkillers just wait outside that radius? Like on the map Azteca... the spawn is guarded by a wall, but people Still spawnkill. :/ (Also, pvp only disabled for humans only in the radius; if zombies can't hurt people inside, then almost everyone will spawn camp. lol) Edit: Personally, I think spawnkilling should be against the rules. That way spawnkillers can be reported and receive a day ban or something like that.
As stated, the game will be more even when people achieve prestige 3. Which is Sharpness 1 with fire aspect as a zombie. I mean, it wouldn't hurt to disallow pvp on the spawn block or make it if you haven't moved you can't be hit.
The only problem with that is couldn't humans just stay in spawn and they wouldn't get hit because pvp is disabled?