Nope.  When I first checked the 1970 Nasson Yearbook I checked for Annette Appollo.  Not there.  However, when I read a post by her sister I checked for Porter.  There it was, Annette Appollo Porter.  This would have to be some elaborate hoax spanning almost forty years.  
It is all quite interesting - but regardless, dead, not dead, existed, never existed - it doesn't matter. TLaB,OLL,AA whatever has chose to depart -either in reality or just on the intertubes. Speculation on our part will never be any more than that. Speculation