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The LHC has placed stringent limits on superpartner masses, in conflict withnaturalness. R-parity violation is one of the few scenarios that allowsreduction of these limits and is thus worth significant exploration at the LHC.We demonstrate that if the R-parity violating operator UDD is used, wegenerically expect all SUSY events at the LHC to have displaced vertices. If asquark is the LSP, it will have a short displaced vertex. If any other particleis the LSP, the displaced vertex is naturally expected to be quite long,possibly even outside the detectors. These scenarios are already constrained byexisting searches for missing energy. This arises because this operatorefficiently washes-out the baryon asymmetry in the early universe, unless thesquarks are heavy and the coupling is small. Avoiding displaced vertices ispossible, but requires baryogenesis below the weak scale. Thus, for example,the use of sphalerons in baryogenesis does not avoid the requirement ofdisplaced vertices. This motivates searching for hadronic displaced vertices atthe LHC with decay lengths anywhere from tens of microns to meters.

Baryonecrosis: Displaced Vertices from $R$-Parity Violation