Relying on Illinois precedent that analyzes whether a neighbor’s conduct qualifies as a nuisance by balancing “the harm done to the plaintiffs against the benefit caused by the defendant’s use of the land and the suitability of the use in that particular location,” William L. Mills sued his neighbor, Fred H. Kientzle III, alleging that Kientzle’s addition of a room to his residence for his elderly in-laws obstructed Mills’ view of Quincy Bay and the scenic Canton Chute recreational area …