Try working a shift at the check-in counter at Bogan Domestic.
Been there, done that!!
I guess what I was trying to say (not very clearly!) was that surely
some human contact (traditional check-in) has got to be better than none (web check-in). At least being in front of a human gives that much more a chance of picking up something odd. As you say, they might get boarded, then again they might not. They'd get on anyway with a computer...
I can admit to knowing what you mean, shift after shift after shift, but even I know enough about body language to have a reasonable chance to pick up on someone telling fibs. I might not get 100%, but some is better than none!!
And we all know everyone will start making a fuss about ASIS etc having more information. Until another bomb hits Bali or the next plane gets blown up. Then all the bleating about 'not enough security' will start.