  We point out that, if R-parity is broken spontaneously, the neutralino can
decay to the final state majoron plus neutrino, which from the experimental
point of view is indistinguishable from the standard missing momentum signal of
supersymmetry. We identify the regions of parameter space where this decay mode
is dominant and show that they are independent of R-parity conserving SUSY
parameters. Thus, (a) only very weak limits on R-parity violating couplings can
be derived from the observation of missing momentum events and (b) at future
collider experiments huge statistics might be necessary to establish that
R-parity indeed is broken. Parameter combinations which give calculated relic
neutralino density larger than the measured dark matter density in case of
conserved R-parity are valid points in this scenario and their phenomenology at
the LHC deserves to be studied.
