Some thoughts about Bedlam:
* LWC on, at least for a few critical elements, such as chests, iron doors (but not wooden), and pressure plates (wouldn't want trespassers to miss out on that deathmachine, now wouldn't we
* Limited residences. You can build a small safehouse/panic room (for free?), where you can safely rest... provided you locked your doors... People can enter and murder you if you forget to close your doors, just not break through walls to get to you. And probably a 2nd residence to safeguard the personal stargate.
* Off-the-map. The dynamic map will not show where people are, nor any map features (except maybe the initial virgin map). For obvious reasons, I want noone to know where I am, nor warn my unsuspecting victim I'm about to give them a taste of their eternal reward.
* Bedlam should be enclosed by a visible (3 block high fence with perma fire on top?) and an invisible barrier (top to bottom), except for 2 main gates (normal ones, perhaps with a stargate, see below) in the west and south.
As for the main stargates, perhaps put 4 of them 'in the field' rather then in a city (unless the city is build around it), each 1000 away in a cardinal direction from the center of the map. So [-1000, 0] (west) would be between Homestead and Themepark, [0,1000] (north) between Homestead and Bedlam, [1000,0] (east) between Bedlam and Themepark, and [0,-1000] (south) in the middle of Theme Park (or a particular themed build). (That would be an interesting city on the edge of Bedlam.. black markets, assassins-for-hire, sleazy brothels...)
Perhaps we could even have clans in Bedlam, with war and such
Oh, and anyone caught griefing/being offensive would be banished to Bedlam and cannot access the other areas until an admin/op lifts their exile