[Tyhm]

This is rapidly slanting off-topic, but I consider an evolving discussion to be a Good Thing.

Most PKing occurs outdoors. Currently you warp back to where you entered the overworld map when PKed. So that should probably stay.
Fort roofs are also outdoors. A special exception should be made for fort roofs - you warp back to the Bottom of a fort when PKed. When they enter the door at the bottom, a leash-String is put on them - when they die, they're warped back - when they leave by the same door, the leash-String is removed. It's like putting on the Laser Tag vest - while you're in the Fort Arena, your respawn rules are changed. (You might have a more clever way of handling it, something with all the interior fort levels setting the string and also a polygonnal invisible NPC on the roof - I dunno, it doesn't front me.)

If the house theory is used, anyone PKed indoors should be shunted to where they left the overworld map - outdoors. A difference of one step from the usual - if you can reenter the building, do so.

If a quest needs a different Respawn Rule, then that works. I'd certainly support interior respawn locations for dungeons (those silly little prismatic spirals I was so fond of...)

Thus, outdoor respawn only changes for forts, and (if houses are used as capturable territory) indoor respawn is only changed by one step - and it's got a Fred Flintstone charm, getting kicked out the window by the sabretoothed cat and having to bolt for the door. That'd be the general rule anyway, the specific rules for dungeons should be maleable.