How to smuggle a water bottle aboard an airplane.
All you need to do is surrender the bottle at the screening station, wait for the the TSA to throw it away in an unguarded trash-barrel on the "secure" side, and then retrieve it from the trash.Do not try this yourself. You never know when the TSA agents you're dealing with have been ordered to arrest someone for no particular reason in order to prove their worth.
The reason this "smuggling" technique works, of course, is that liquids aren't dangerous. Everyone knows this -- even the TSA. That's why they don't guard the barrel after they confiscate your wine, water, and salad-dressing. The point of taking away your liquid isn't to make airplanes safe, it's to simultaneously make you afraid (of terrorists with magic water-bombs) and then make you feel safe (because the government is fighting off the magic water-bombs). It's what Bruce Schneier calls "security theater."
I don't like the TSA because it makes millions of people waste lots of time every day. Just like Windows.