I am on the cusp of 5 miles from a small airport. (5.2mi as the bird flies) I was flying at 400' (or slightly less) near my home and watched a small prop plane come by really low. Hard to tell from my perspective, but it appeared to be lower than my solo. It wasn't on a terminal path, but I descended anyway. That same prop plane flew 3 low altitude circles around my neighborhood after the initial fly-by. At that point I was keeping the drone closer to 60' in altitude to be safe. I wondered if he/she saw it on the initial fly-by and was trying to locate the pilot. How responsible are we if we're operating within FAA guidelines and the airplane pilot is flying lower than expected?