Large scale vandalism - Hudson Bay

I am not happy to see this: - http://postimage.org/image/pdyvjrsnl/

Why dont we want to filter large scale edits before they go to rendering? I asked the other day about locking objects and got pretty negative answer (http://help.openstreetmap.org/questions/7841/is-it-possible-to-lockprotect-some-content-nodes-ways-relations). Seems this has been reverted already, but probably it will take some time before renders back again I guess?