Pretty crazy. A friend of mine is a journalist who has a quadrocopter that can lift up to 7kg. So it could even take a cat for a ride if it had to. These quadrocopters are pretty crazy. His goes as far as 2 miles and he has a small onboard camera that streams video directly (with a bad resolution but still).
The biggest problem for these drones are other interfering frequencies that mess with the controls. Shouldnt be too hard to build a jammer if someone gets a bit more into the details of this. He avoids flying too close to skyscrapers because of this, even wireless router signals can cause some problems.
Alea iacta est ("The die has been cast")