Ultimately, both centralized systems and decentralized systems are facing the same fundamental problem, which is that the "marketplace of ideas" (and of public goods more generally) is very far from an "efficient market" in the sense that economists normally use the term, and this leads to both underproduction of public goods even in "peacetime" but also vulnerability to active attacks.

Any mechanism that can help genuinely under-coordinated parties coordinate will, without the right safeguards, also help already coordinated parties (such as many accounts controlled by the same person) over-coordinate, extracting money from the system.