Airtight Security.

James Nicoll has come up with a brilliant way to prevent the kind of mess that we saw in Toronto on the weekend:  Hold G20 summits on the International Space Station.  The Black Bloc idiots would have a pretty hard time causing trouble when space travel costs far more than they can afford, and the cost of flying the leaders to the ISS is likely less than what was spent on a questionable security effort.  And just think what kind of boost it would give space travel in the public eye.