We were flying out of St. Thomas years ago, and they put a security desk just inside the door to the waiting area. The TSA person was sitting there with a cooler full of confiscated drinks, offering them to co-workers and airport staff when they passed by. We knew they were confiscated because she was quite happy to let her co-workers that when she talked to them.
Another time, my sister-in-law flew from Reno to PHL with a stopover in Phoenix. When she got to our house she rummaged around in her carry-on bag looking for something, and said "Oh!", as she pulled out a machete from the bottom of the bag. She had taken it to work to cut watermelon, and planned on leaving it there until she returned from her trip. A co-worker decided to wash it and put it back in her bag. It made it through two TSA checkpoints, no problem.
I was scheduled to take the last flight out of Oakland to Dallas. Once through the gate, they announced mechanical problems and a two-hour delay. It was a work thing and I had to get there that day, so they put me and my single piece of carryon luggage in a shuttle bound for San Francisco. When I went through TSA at SFO, they discovered the two pair of scissors that I'd forgotten about in the outside pocket of my suitcase. Yup, outside pocket, as in, they were right on top when they went through the scanner at OAK without being noticed. Once they were discovered at SFO, much discussion ensued. One pair was a very expensive pair of thinning shears that I didn't want to lose. I showed them to the agents and demonstrated that they don't cut anything but hair. They actually let me keep them, as long as I moved them to the inside of the the carry-on bag(!). They kept the other pair, which were easier and cheaper to replace.
Before anyone asks why I was carrying on two large pair of scissors in my luggage, I'm trying to remember. I think I had visited my sister the week before by car and brought my good scissors so she could give me a haircut. I've used the same suitcase for twenty years, but I rarely use the outside pocket. I simply forgot about them when I unpacked after the road trip to my sister's.
I don't fly much any more, but I used to fly at least twice a month. I remember that all your liquids had to fit in a quart size plastic bag, which was a pain in the ass. I gradually stopped bothering with that and it doesn't seem to be an issue any more. I just toss in my whole translucent toiletries bag. As long as I never put anything oversize in it, it sails right through. Has the quart-size bag policy actually changed or has TSA just stopped enforcing it? Not that I'm flying again any time soon, lol.