Maybe it's amusing, at first. But then, you don't know how it's affecting your planet's time stream. Or what damage it's possibly doing.
The last time something like this happened to me, Torchwood agitated a spatial disturbance by foolishly firing particle engines at it, without knowing what they were doing. I sat back and did nothing, deciding to observe and watch them dig their own hole, but it went horribly south when an army of Cybermen came through to take over the planet. Oh, and I nearly forgot to mention the Void Ship, which opened up at the same time and released the Daleks inside, hell bent on destroying the Earth. People were killed, and I lost Rose and I'm not standing idle again.