Security can be done right. Look at satellite pirates. In '04 or so, they got the boot in a sophisticated way, and that form of security breaches has been dealt with. Similar to GSM/LTE. Other than governments, those protocols have held up extremely well against attack. Even the venerable ATMs which were made in the '80s still are decently secure (although in 2015, everything is changing to chip-on-pin systems.)
However, in general, because some businesses feel there is no return on investment from security, they go cheap. However, with the risk of reputation loss, I think autopiloting cars will be done "right", and only the top tier hacker organizations will be able to get a foothold.