Imagine a botnet of these!

Only operators with the proper key can control the robots.

Adapt autonomous driving technologies. Google cars are already driving themselves, avoid obstacles, and such.

No, they're already driving in traffic.

That's a false assumption, because they're driving on major Californian roads for thousands of miles.

Driving slower than traffic is quite dangerous.

I am in flavor of crawler/roller/climber bot. I guess that's technically trespassing people's property, but I don't think humans will care if robots are doing "business" on the roof.

Even so, climbers would serve the division of labor of carrying packages to suitable location for pickup. Basically, such bot would hold up the package into the air and let the plane "snatch" it away without even having to land. It just need to be in a location where a plane doesn't crash into a wall or electrical lines.

Luckily pizza delivery drivers dont get paid very much... I wonder if people would be more or less likely to tip properly?

what about the Skynet rule?

All this sounds like a hackers gold mine, i bet they can't wait for all this to start too.

Fully homomorphic encryption would open the possibility of 100% autonomous robots.

The robots store Bitcoin private keys inside a fully homomorphically encrypted program.

Whenever the robot gets repaired or refuelled (by whoever feels like doing it - there is no central authority maintaining the robots), the robot rewards that person with a few BTC.

Of course the robot would require some unforgeable proof that it has been refuelled or repaired, before sending a BTC transaction. I'm not sure how this could be done.

The robots could also "earn" BTC by delivering stuff for people and getting paid.

Vandalism is discouraged, because if you destroy the robot the BTC stored in its memory are gone forever. Remember that simply copying the memory is useless because it's encrypted, and decryption is only possible by interacting with the robot.