Unconventional Concepts President Michael Hopmeier and town of Lewis residents engaged in an evening of frequently testy exchanges at a public meeting Thursday, as homeowners protested a recent series of war games that they viewed as inconsistent with the tranquility of the Adirondack Park. Hopmeier contended the noise associated with low-flying aircraft and weapons testing is no worse than the everyday sounds of logging operations, truck traffic on the Northway or even the F-35 fighter jets routinely flown out of Burlington. About 75 people attended the meeting.