So some people here are of the mind that the guy had no intention of landing and he was simply buzzing the house?
Either this, or that even if he did intend to land there, it was an inappropriate place to land.
The first requires knowing his true intentions at the time, which only Palmer himself can know.
The second is an interpretation of regulations that necessarily have some wiggle room because they can't cover every possible situation in detail.
Hence the ambiguity in either case.
If it were a criminal case, he would have presumption of innocence and the onus of proof is on prosecutors to prove beyond reasonable doubt.
"Preponderance of evidence" means go wherever it suggests, even if only 50.00001% in that direction. This implies no presumption of innocence to overcome.
In my view, the preponderance of evidence suggests he violated the regs. Yet I'm not sure it is convincing enough to rise to the level of "beyond reasonable doubt".
Note: I'm not suggesting the civil regs under which we fly are oppressive or capricious, nor that FAA enforcement is. Only that there is some ambiguity, and not because the regs are somehow flawed, but necessarily so, and the FAA will use this as they see fit to fulfill their mission. Every pilot should know this and fly accordingly - don't push the limits of the regulations and tempt the FAA. Palmer didn't do this, and even if he actually was innocent (which I doubt), shows the kind of poor judgement we try to weed out during pilot training. He seems to have some of the 5 hazardous attitudes: impulsivity, macho, invulnerability.