What is your opinion about neutral creatures?

And if there were initially around 500 of them, then what? :) I don't play without a hard drive, and that's why I forgot what 20 is! That's the first thing!
Secondly: I meant 20 nearby, but if it's remotely, then 2 monsters at 30 each! Cast on both of them?! And if it's just a non-critical enemy, say level 20, then what?! Will they pretend to be dead?! :)
And do they also have good morale?! :)