I'd still say they are secure, people just need to learn how to use them. Just because I could drive a car onto a sidewalk and mow down a bunch of pedestrians doesn't make cars a prohibitively dangerous technology. Its just a matter of regulation, and analyzing trade-offs.
I think maybe the biggest reason why such fraudulent activity is so rampant right now is because of a lack of regulation, another reason for the frontier metaphor, i.e. unsettled by major institutional actors who lay down the law.