Lesley Carhart 
VessOnSecurity@hacks4pancakes Goddammit, this is such ignorant bullshit...
To begin with, the computers in the cars are protected much better than those of the voting machines.
Furthermore, it depends on what "voting machines" means. In my country they are just glorified printers. The voter uses the computer of the machine to select a vote - but eventually the selection is printed and then counted by hand.
And if the meaning is "remote voting", then voting has requirements like anonymity, non-repudiation, authentication, protection from coercion, etc. that car computers don't need and don't have. I once wrote a small essay on this subject - "why we can order cucumbers over the Internet but can't vote remotely".
Oh, yes, and the self-drviving part of Musk's cars pretty much sucks; I wouldn't trust that, either.
Hovav Shacham