Should we convert passenger air-liners to drones?

There's no real advantage - we currently have autopilot that's quite good, so you really have the best of both worlds - skilled humans plus useful computers. Hijacking is not that big a concern, and the cost of human pilots isn't that great (compared to fuel and capital costs).

Also, if you centralized things on the ground, you'd create a big target - come get 1000 planes with one hijacking.

- Pretty hard to hijack / Possibly, but what about hacking it? If it used gps technology researched have already shown that it can be messed with to take control. http://www.bbc.com/news/technology-18643134

The main advantages would be on the cost side. Obv removing the pilots. Also removing all cockpit gear which is probably costly. And that space could then be used for additional seating.

I would fly in one as long as it was cheaper.