I had an odd run in with the FAA in the San Jose area while doing survey. It's a long story but i'll try to keep it short. Competitor starts snooping around our plane, we confront him and he runs away. The next day an FAA guy shows up to our hanger demanding our logs and starts just walking around looking at all of our stuff. We promptly told him to leave the hanger and we will talk outside because of all the sensitive equipment, and we had no intention of flying that day. It started a long thorough investigation into the aircraft but we had everything in order. Our chief pilot talked with the FAA boss and found out it was a new guy. The FAA boss agreed his man was in the wrong, but said we made it much worse by not being cooperative. I would probably treat it the same way again in that situation considering the guy was a total d-bag from the start. That being said, I've had lots of other run ins with the FAA and they were all quick and easy. Most of they guys just wanted to bs and talk about airplanes.