The mandatory xray gives away a Big Secret: A xray detectable metal object (like a knife or detonator or bullets) hidden inside an opaque 3.4 oz bottle is a much greater danger than whatever liquid is in any of the bottles. TSA knows it, the sheeple are supposed to be too stupid to figure it out.

It's time to start a rumor that hydrogen peroxide glows under UV light. They can then take the UV from the slows-down-the-line ID checker and have the xray tray stacker UV every Kippie Bag on the belt. It will really impress the he double el out of the Kettles this summer. "Look Pa, how thorough these folks are protecting us. They even use their Tom Swift electric light on every little bottle!" Pure Oscar winning Security Theater.