True story, just happened.

The ramper who met my airplane on an overnight trip (we had just arrived, and were scheduled to take the same plane out again at oh-dark-thirty) who accosted me as I deplaned, saying "You got a serious airworthiness problem."

I followed him to the rear of the aircraft, where he pointed to a very small dent in the engine cowl. Good catch, but I pointed out to him the daub of yellow paint highlighting the dent, which is an indication by our MX department that the dent has been reviewed by MX and signed off as airworthy. I'd seen that dent earlier in the day; that yellow paint tells us it's OK to fly.

I explained this to the ramper, but he refused to accept it. "This airplane is unairworthy." I responded, "Well, why don't you just go tell that to my captain, 'cause she's going to disagree with you, and she's the final authority as to the operation of this aircraft." He proceeds to do this, and gets the same answer.

Not to be denied, he says "I'm going to have to report this to the FAA." We told him to go right ahead, and we went to the hotel.

An hour or two later, in the middle of the night, my CA gets a call from our MX department asking what the heck this ramper is up to. He apparently called our HDQ and made a huge stink about pilots who were flying an unairworthy aircraft. He may have actually called the FAA, too.

Where do they find these people?!?