Marines conduct FARP operations at WTI ...pics by Cpl. Harley Robinson

Note:  Everyone does this but no one practices security for it.  I wonder why?  During the Cold War almost every book I've ever read talks about the threat of Soviet Spetsnaz, Paratroopers and Naval Infantry operating behind the forward edge of battle.  Is this another forgot lesson of the past?  Regardless it doesn't apply to this training evolution (WTI maintains standards and "trains the trainers").  I was just wondering out loud.