At the annual hackers convention in Vegas known as DefCon, thirty voting system computers (both voting machines and electronic pollbooks) were made available to attendees to crack at will! Every single system was reportedly compromised in some fashion by the end of the weekend --- several of them fell within just minutes of opening DefCon's so-called "Voting Machine Hacking Village".
"the amazing thing is that all of those successful hacks, these were by people who, most of them, had never seen a voting machine before, and certainly not the system sitting in front of them, and they had not met each other before. They didn't come with a full set of tools that were tailored toward attacking these machines. They just started with a piece of hardware in front of them and their own laptops and ingenuity, attacking the various systems. And it was amazing how quickly they did it!"