Just an idea:
After several suicides (!rtd, molotov/gravity/prop/dying at/near ZSPAWN/Woodchipper/etc.) at wave 0-2
You receive a temporal debuff, that decreases your maximum hp as a zombie.
More you suicide early on - less hp as zombie you have. Each map that you haven’t suicided early (And gained some points) increases your MAX HP as a zombie by 1/2 of what was taken away previous time you suicided.
Woulda make me stop zmaining and maybe others.(Poi is better than me at zmaining and he is zombie like every time I see him playing)