S.A.C. and mass hysteria 

It occurs to me that Stand Alone Complex could be considered a precondition, a category including, or even synonymous with mass hysteria.  Thinking on that it occurs to me that S.A.C. may perhaps even long before the series (although it has been stated here it originated with the director Kamiyama) either have been euphemism for mass hysteria, a rhetorical rationalization for the belief in mass hystia, or something else along those lines.  As such there may be previous references to S.A.C. in japanese circles of crypto-psychology.

On the other hand this may be an entirely accidental coincidence.  Although I think an exploration of the parallels between the two may still be in order either way.