Far more reasoned than some of the stuff on this thread.
It links to the clips from NASA too. The aliens are trying to get through to tell us about the cons, but NASA are zapping them, and using their wrecked crafts to bung up the hole, and act as a deterrent, in the same way gamekeepers nail foxes and crows to the fence as a warning.
NASA are involved because the rate of expansion needs to be controlled, and the extra holes they make when they puncture our atmosphere when they launch rockets was liable to cause too much to leak out at one time, as they're planning a lot more launches in the future. Hence the need to reduce the other bilge point.
