Simply put as we know bungie can track where and how much time is spent in areas of the map... So they can simply put in a debuff such as [i]hardscopers curse[/i]for after 15 seconds of staying in a 10 meter by 10 meter area and they will die.
They still have the chance to get kills, but this would make it so they have to actually move... Thus allowing people to move across sniper lanes without being immediately sniped. This would not make hardscoping impossible, just more difficult.
No hate comments please just constructive criticism to balance this idea.