Sure, they can do other things (Keep lord unattackable with doors closed, Auto-port out with doors closed, etc) but it all comes back to lazy programming. If you want a Z axis program for it - or just do a flat world and save us the headaches =)

We were defending a keep from the typical destruction Zerg. They had triple our numbers, and man, it was awesome, and we were holding tight. The beat the doors down, we managed to wipe them on the Keep Lord and the doors locked again.

We waited, and sure enough the Destro Zerg came back - only this time, they purposely wiped on the guards at the door - they weren’t fighting back - why?

A shaman had snuck up to the top of the keep when they orginally wiped, which we didnt catch (as most of us had wiped too, and again, we were severely outnumbered). Sure enough, the Shaman was able to rez them from bajillion feet away, and they ended up having 2 full warbands rezzed to the top of the keep (with the doors still closed, mind you) to which they crept down and wiped us out afterwards. (again, doors still closed)

Took us too long to figure out what they were doing. I thought they were just suiciding and releasing (for no apparent reason). Super cheese.