A few years ago, one of those kindly old lady neighbor types had an industrial-size bird feeder installed on a pole just about 10 feet away from my property line. My house was the tallest in the neighborhood, so my roof peak served as the avian version of the Holiday Inn Suites. At one point, I had so many birds on my roof that I swore that I saw Tippi Hedren and Suzanne Pleshette running down my street. She either became too infirm/too bored/too cheap to keep the feeder filled, so eventually things tapered off, but it was a PITA while it lasted. One of my other neighbors bought out Home Depot's stock of plastic owls, which did much for local aesthetics, but little to abate the problem.