I just want to jump in here in the hopes of imparting some experience about what the FAA's position is on low passes, sharp pull ups, etc.
We have a situation here in central Florida in one of our aviation communities where there is one individual who apparently takes great pleasure in turning folks into the FAA for certain activities at his home field. Those of us here know about this situation and stay away from this field or at the very least we are forewarned about the potential consequences. This guy will sit out in his yard with his video camera and film anyone who makes a low pass, non-standard pattern, etc. He then files a complaint at the Orlando FSDO and sends them the video. There have been numerous violations issued because of this individual--some are legitimate, others borderline, but who needs this? The FAA takes the position that if they receive a complaint, they must act, and oftentimes it results in a violation under the "careless and reckless" category, if not outright aerobatics. So, there you have it, we have documented cases here where the FAA will violate someone for a low pass. Their position is that this is "careless and reckless" operation, albeit usually someone has to issue a well documented complaint before they will issue a violation.
I guess what I would take away from this is that anytime you make a low pass and high-g pullup, or just a low pass, you are potentially risking your ticket. Most times you will get away with it, but why risk getting into a hassle with the FAA?
I hope this information will help someone avoid a potential problem some day!