Right after 9/11 I flew into NYC with an 1/8 in my pocket. I flown another 15+ times since then with an 1/8 or 1/4 right in my pocket. AP security is looking for weapons and large amounts of drugs (at least that's what I tell myself) and I walk through no problem. I've even been pulled aside and they would check me with that handheld metal detector. And I have long hair and big chops so I look like I smoke weed. Never had a problem.