guess the security for this system has to grow with its problems like any system.
any state of a security system is just a point in the timeline of a kind of arms race.
The Opportunity to handle this issue is hoping that the right persons find possible bugs or attacking scenarios and secure them before somebody with "destructive" intentions will use it to benefit.

So your easiest opportunity to secure the system is spend attention on people which are willing to help securing the system in a collective way and reward them.