It's kind of old and rather useless aproach by now.
Autorun is not enabled in modern Windows ( XP is officially out ), and if they would all use MacOS or Linux , it wouldn't work at all.
The real problem is that security is always in a way of getting things done.
Compare it with air travel - in old days I could walk into airport 10 min before take off and still make it. Unthinkable by modern standards.
There is always compromise between how secure system is and how much work is expected to be done. You just found that compromise and exploit it.