The standard minimum distance for a clearway or stopway is 1000'. After that, houses, berms, roads, drop-offs etc. are all permitted as long as they are below the obstruction clearance slope.
If we consider going to the considerable expense of providing arrestor beds before solid obstacles
Arrester Bed Examples , we come up against the fact that arrestor beds are designed to handle a 70 kt. overrun of a
decelerating a/c.
A 747 at 130kt. and full power may well exceed the capacities of an arrestor bed.