Ok alot of people are fed up with Spawncampers on ZS *Cough* Hospital *cough* sorry bad cough
The best thing you can do is Not respawn.
They will get Board and Leave.
You dont want them to have 20 Kills on wave 7 do you?
Best thing to do is just Wait. Be Patient.
Or if there IN The spawn on Infected hospital, Go wraith
They Deal 50 Damage and are Very use full on this matter
At wave 7 just go chem and problem solved.