I have managed to get into the dungeon through the temple once. After walking across the rope, I waited until my health was 100%. Then I went to the lowest corner of the platform, and walked (running seems to make me lose more health) out, landing on the rail (highest point) below.
HP left: 3.3
That\'s after some training, so I would say that it does help keep some newbies out. Not dwarf or kran newbies I guess, but for a female demorian, the last jump can be lethal.