Originally Posted by dannyr
Each passenger is given a boarding pass which identifies them as the traveller. For the same reason you can't go through security with someone elses passport.
If the plane went down for whatever reason, and the guy in 28B was found to be carrying explosive, they need to know who it was.
so, how do they know who was who in 28B on a Southwest, RyanAir, EasyJet airlines?
In case you don't know, the above airlines do not have assigned seating...