Such as zombies, scientists, etc...

That would be a nice feature.
I was watching my server's console output and I noticed that scientists were killing each other for hours (6412200 was killed by 7722569, for ex.), when I went to the Oil Rig there was a sleeper, about 1 or 2 meters below sea level and the scientists were not able to kill him, even when I tried killing the sleeping player my first shots didn't do any damage (I have Hit Icon) but I was combat blocked anyway, and finally on my 5th or 6th shot I was able to damage the sleeping player.

please add this... animals dont even flee anymore