While I'm not suggesting anyone does any of this, it just shows how absurd the id requirement is. As long as there is no verification between what is presented to the id checker and who is actually flying where the id check does nothing except help airlines with revenue protection.
There is an even easier way then what VPescado illustrated:
Step 1: Buy ticket to where ever you want to go in some other name, preferably - Al Kyder or Terry Wrist

Sorry couldn't resist
Step 2: Use a standalone boarding pass generator and make your own boarding pass that matches whatever you are carrying as id. Since there is no check to make sure that the boarding pass is valid or you are even on that flight you can pass through security.
Step 3: Use fake boarding pass to cross security.
Step 4: Board plane with real ticket and no one knows you are really on this flight.
or
Step 1: Buy ticket to where ever you want to go in some other name, preferably - Al Kyder or Terry Wrist

Sorry couldn't resist
Step 2: Do Internet check in and print the boarding pass to a PDF file.
Step 3: Edit PDF file and change the name to match your id.
Step 3: Use edited boarding pass to cross security. Again there is no check to make sure that the boarding pass is valid or the name on the boarding pass matches a passenger on that flight you can pass through security.
Step 4: Board plane and no one knows you are really on this flight.
I could go on with other ways to get a boarding pass with the kiosks but then you start needing equipment that can write to magnetic strips.
The limit on liquids is equally absurd.
Every chemist I've talked to has said that you basically need laboratory conditions to make a liquid explosive so making one on the plane is basically humbug and the ready made liquid explosives are very unstable.
The one said, you have a better chance of blowing yourself up on the way to the airport then an airplane.
Furthermore, since the TSA has no idea what is actually in the 3 oz containers, you could just take your ready made explosive and fill as many containers as you want and fit them in the quart size baggie. Repeat with as many of your cohorts you feel is necessary. Unless you get secondary, and have an ETD test on the stuff you are home free since guess what?
X-Ray machines don't detect explosives! All they can do is help someone see something that might have been modified. How will you do that when all you can see is a bunch of 3oz bottles inside a quart baggie and have no idea what is in them?
Providing you haven't blown yourself up yet, you can then board the plane and attempt to smuggle the bags into the lavatory where you can pour everything into the nice big quart sized baggies that the TSA has mandated and ignite them by shorting out your iPod and creating a spark.
Did I mention before that liquid explosives are really unstable?
If liquids are such a risk they should be treated as hazmat when they are disposed of. I have yet to see any hazmat indicators on the garabage the screeners are throwing the stuff into, or in some cases drinking. There have been documented cases where the screeners have been seen drinking the confescated water.
After all aren't all of these liquids potentially explosive? Think of the screeners!!! They could be drinking an explosive liquid and think it's water?
There is even an easier way. Attach an explosive device to the unscreen cargo that is loaded onto the plane.
Again, I am not suggesting anyone do any of these things. I am just bringing them up because I am tired of security kabuki theater. Someone needs to do a risk/benefits analysis and get rid of all of the window dressing and put things into place that can combat real potential threats.