Our sealed underground habitat is entirely safe and free of predators. I just happen to like wearing heavy-duty snake-boots and jungle fatigues.
The Matrix taught us that it's cool to meet up with strangers in remote crumbling houses. Especially when said stranger offers you pills that will "open your mind..."
Find Meaning In Your Life With Demotivational Posters
(William Shatner, Deforest Kelley, Star Trek)