Strongly agree with this! My phd advisor is a security researcher, and he loves to remind me how much the social practices around security matter. In his opinion, the security afforded by webs of trust and robust communication channels tends to be just as important as the security afforded by proper technical practices, or even more important. And I definitely see data availability as one way of increasing robustness in communication.
BTW, anyone thinking about security/fraud should also check out the recent Gitcoin Community Proposal from me, @ale.k, @erich, and @kevin.olsen! The idea is to implement new research Glen Weyl and I have done on collusion-resistant QF for the GitCoin ecosystem. I think this could be another awesome way to prevent fraud, while also helping grants become more pluralistic.