What worries me about this is that it might damage Cydonia, Tithonia or one of the other artifical sites on Mars. The meteor has a 1/75 chance of hitting the planet; you can guess the tiny odds of it hitting one of the sites-of-special-interest. So if this happens we'll have to ask ourselves if it really is an accident. It could be aimed deliberately at those places, or a site that hasn't been discovered yet because the powers-that-be don't want us to see it. This is very interesting timing because next year Richard Branson hopes to launch the world's first spacecraft specifically-designed to carry tourists. The actor Brian Blessed and the famous scientist Stephen Hawking have already bought tickets (It's good to know that the craft is wheelchair-friendly). The advent of easily-accessible space tourism must be a worrying development for those who want to keep secrets about what really lies up there!
If Cydonia or a similar location were to be destroyed it would be a terrible tragedy and a desecration of a universal heritage site. I don't know what we can do to stop it happening except pray and hope that the aliens break Prime Directive and intervene.