At too many concerts there is a hostile feeling of everybody
grabbing space and protecting turf.  This feeling
is exacerbated by the "first come, first serve" nature
of the seating.  A better way of doing it would be 
for everyone to have some time in the really good
seats and some time in the not-so-good seats.  You 
can do this simply by giving up your seat part
way through the concert.  Then somebody else can
have it.