Funny story I heard years ago - some fellow was flying a motorglider in a schoolyard in a suburban area near where I grew up. Got it up to altitude then shut the motor down. The cops rolled up to the pilot, walked up to him and said there were noise complaints about a model airplane.

Our hero at the controls said- "Officer, this is a glider...do you hear anything?" The cop just shook his head and drove away.

Of course, our hero didn't mention the motorized part of the flight. But it illustrates the hypersensitivity of folks to certain noise. Lawnmowers? Weedwhippers? Leaf blowers? Circular saws? No problem. Model plane? CALL THE COPS!

It also illustrates why electrics and 4 strokes are extremely popular - the noise isn't as much of a irritant to the anti-aviation crowd.