Social Slashing Exploits: Reputation-Driven Enforcement Failures in Proof-of-Stake Networks

Proof-of-Stake (PoS) networks rely on slashing mechanisms to deter validator misbehavior and preserve consensus security. While early designs emphasized cryptographically verifiable conditions, many contemporary PoS systems increasingly incorporate social, governance, or reputation-based enforcement mechanisms to supplement protocol-level slashing. This paper identifies and formalizes a novel exploit class—Social Slashing Exploits—where subjective reputation signals, off-chain coordination, or governance influence are weaponized to selectively penalize honest validators or shield malicious actors. We analyze how reputation-driven enforcement undermines determinism, enables cartel behavior, and erodes consensus neutrality without requiring protocol violations. The paper argues that reputation-weighted slashing cannot provide reliable security guarantees in adversarial economic environments and proposes a logic-layer enforcement model based on execution-bound, objective misbehavior proofs. This approach restores deterministic accountability, preserves validator neutrality, and improves long-term system survivability.