I've had TSA agents look through my wallet, and on a separate flight look through playing cards one by one. I was also let through with no screening once by acc

I've had TSA agents look through my wallet, and on a separate flight look through playing cards one by one. I was also let through with no screening once by accident. I've seen them yell at passengers, drift off, sit around talking with long lines waiting, and every other conceivable offense. Most are fine but there are a lot of exceptions. They contribute nothing, and I for one fly less frequently because of them. As to pre-check: at Atlanta that doesn't always get you a short line or fast security wait time.