I can only echo the comments made here. Zs are not scary anymore, sadly, but the roaming Zs are brilliant! Killing a Z should be risky and should always be weighed up. I miss the panic of hordes, running for my life and seeing my friends die...
I'm just got it and checked the logs for my server - I was kicked for carrying about an Sa58 magazine, so I'm guessing it's banned items you're carrying