I have seen in the US that the security guys there actually have perspex "Cutouts" on their x-ray machines, and that if a piece does not fit through that, then they have to go and check it in.
I agree with F111 that maybe internet bookings and/or E-Tickets, and especially this new "quick check in" or self checking in system may cause an increase in baggage being carried onboard.
I also find it disturbing re the comments that we are not as bad as the US. therefore we are doing OK.... Do we really have to lower ourselves to US's standards before we do anything about it ? Surely as professionals we should be learning from the mistakes / wrong policies of others and NOT making the same errors.
A question that always gets the pax stumped, I have found, is.... " What is in that bag (which weighs 12kg)that you are absolutely unable to do without for the next 45 mins?"
Is this an accident waiting to happen ?