Appreciate your helpful attitude. I agree that a lot of things are outside of your control, but if you can move things up the chain it will be helpful.
With that said, here are some of my suggestions:
-allow passengers to lock their checked luggage. If their luggage needs to be checked, do it in the presence of the passenger.
-if you're going to do a full body wand, then allow that person to collect his/her luggage first, so that it doesn't sit unattended, and then wand the person.
-have a secure area at the check point, where passengers can't just walk off unchecked. I don't know how many stories I've read where entire airport terminals have to be evacuated just because some passenger walked off before secondary screening.
-there needs to be at least one armed airport security personnel at the check point. When I flew in the UK they had police officers with sub-machine guns. While I feel that the paranoid level in general has to go down, the security should have some bite to ensure a terrorist doesn't rush the security check point and kill passengers or TSA personnel.
-make better use of our tax dollars. I believe the current security can be made more effective with less dollars. There's no need to over-spend on airport security, when there's so many other areas in our lives that could use the money. The TSA is a bloated agency. This agence must reduce and still be more effective than it is today. We can not afford the current level of TSA over-spending, when teachers are getting laid off, and there are rampant energy issues.
-create and publish a passenger bill of rights. When a passengers suffers some type of inappropriate TSA treatment, provide a formal and quick, and effective complaint process and resolution. Today I don't believe there is any formal, impartial process for passengers to go to complain.
-as you stated, the list of prohibited items needs to change. Little scissors, small knives, and miniature letter openers should not be prohibited. I have stopped travelling with a small scissor, and it's a real pain because many of the hotels do not have scissors in the rooms. Scissors can be used to open packages, trim loose fabric, etc etc...