ok there seem to be many misconceptions about airport security. first of all, they cannot ask you to disrobe without a warrant. an external pat down and metal detector wand is all that is legally allowed. the pat down will be thorough (imagine the ones you've seen in movies), but the won't put their hands directly on your junk or in your ass. they may graze the surface. secondly, the dogs and "sniffing" machines you see are to find bombs and other explosives, not drugs. any german shepard you see is looking for bombs. if you see a beagle (like in canada), those might be looking for drugs, but in america, one guy with a quarter is not nearly a important as one guy with 2 oz of semtex in his shoe. the machines are chromatographs, and they are only able to detect explosive materials and biological materials with explosive potential (like manure or anything else with alot of ammoniacal nitrogen, like say, plant food!). finally, if you're flying from cali, and you've got less than an ounce, you'll be ok even if you do get caught. they only make you pass through security getting on the plane, not getting off, and in california, less than an ounce is decriminalized. you'll get a fee and miss your flight. international travel is a whole different story.