Can't understand though what the residents on said block are concerned about though, the target is extremely unlikely to fall on to the building upon which the missiles are housed!
The target might not fall on the building, but having seen a (live) Rapier do a complete loop and land back within 50ft of the launcher, with people diving into nearby trenches, I would still rather be as far away as possible.
As most commentators above say - no real thought seems to have gone into this hare-brained scheme, unless the writers of 'Twenty-twelve' really ARE running things!