Reading the reponses in the 'comments' below the link, mention is made of an ' eighteen foot' barrier that does/did exist, and that 'prominent' people also use this area for shooting---- any additional verifiable info on this? How recent is the last damage?
Could it be others may be responsible for the damage/ danger to the adjacent dwellings? It seems some elementary investigation would contribute to identifying the responsible parties, of which the interviewed gentleman most certainly could be, despite his opinions about ballistics. Perhaps there are others, perhaps damage was done in the past and he is a fallguy/ cover for activities of others?
Just doesn't seem difficult to mark existing damage, wait and listen for shooting, then recount new holes.