I agree.. unfortunately both parties are in a race.. not to do the most rational thing, but to appear "tough on terror".. The whole "War on Terror" implies a zero-tolerance mentality akin to that of the "War on Drugs"..
Lately traveled from Europe to the US and back. Total "liquid screening" checkpoints both there and back prob. on the order of 8-9 (more than once per leg of journey).
1.) I hadn't packed any liquids in my carry-on, so I just said I didn't have any and WALKED RIGHT THROUGH unchallenged. While the TSA people fiddled with other people's toothpaste and hair mousse.
2.) After the TSA folks sequester your POTENTIALLY EXPLOSIVE LIQUIDS.. they just dump them all in a garbage bag 2 feet away from where everyone is standing!!
Since they are so hot to collect this stuff, wouldn't the next logical step be to have it immediately analysed, so that if there was a suspicious substance you could match it up with the person who tried to bring it on board??
The whole thing is a farce just to make it look like "we're doing something".