...Wow. I agree the civilians should be running away and the party should have no trouble winning here but is all that vitriol really necessary?
As was suggested earlier in this thread the encounters are of significantly higher CR than usual. As was also suggested in this thread, the monsters tend to have much higher than normal hit points. I wasn't GMing, so I don't know the number. I usually just double them.
I believe we were 8th level during the encounter. It was part of a fairly elaborate siege adventure, used with Heroes of Battle's flowchart rules. The enemies came in waves, the Vrocks being part of a floating skirmisher corps, supporting ground troops. The "back" of the village -- i.e., the place where the villagers could run to without running into the milling horde of zombies, et al. that were the background to the siege -- was a ravine. They could have scaled it, I believe, but would have been subjected to dakaelfin (it was a Norse game, say evil fae) archers.
The party also had a lot of gish-like qualities (I myself was playing an archivist gish type) -- so while our ACs were high enough that the Vrocks would have a very hard time hitting us, even with TK, and also had to contend with some DR which nerfed their multiple attacks and would also nerf a cloud of boulders they threw at us. In addition, the party lacked a lot of ranged punch in this particular encounter: we relied a lot of dragonfire inspiration, but it was lightning based and vrocks are immune to it. So, yes, if memory serves (this is from 8 months ago), killing Vrocks with 2-3 times their normal hit points in that particular scenario while still stopping their allies from tearing open the awesome fortifications offered by earthen huts and murdering the civilians inside was, if memory serves, an interesting challenge.
Some of this, I think, was done for convenience. Our battlemaps are only so big, which favors some set of area attacks in the rare occasions they come up. Some of it was clearly "the setup," and b/c we think the idea of defending a village from a siege both interesting and fit with our characters, we, the Players, were not too inclined to throw a wrench into it. We may be doing it wrong (tm), but somehow I don't think so.
Now, I suppressed all that information from my earlier posts b/c I didn't think it was important for a side post about how I liked how this one mechanic worked out in this one instance (Saga Edition has similar mechanics, too, it occurs to me now). Apparently that was a mistake ...