Tell you what, why not build pax terminals 5 miles away from the runway - but, no, that won't do either, what if an aircraft drops out of the sky while on the downwind leg? That's it then, they'll have to go underground....but, blow me if the security risk assessment says that's not a good idea either. OK, I give up. Where do you suggest, IcePack?
More seriously, ICAO Annex 14 sets out the areas that should be clear of obstructions etc. for when an aircraft departs the runway in an unintended manner. Now if you want a discussion on the suitability of Runway Strips, Cleared and Graded Areas, Obstacle Clearance Surfaces etc., by all means lets have it - but for heaven's sake let's be sensible about things!
PS - I was on a railway platform the other day and I tell you, if the train had derailed as it came into the station it would have been pretty dangerous for all of us there!