In law of trespass and nuisance, flights above one’s property may be actionable depending upon whether they are in the airspace of the lower zone or in the zone beyond the owner’s “effective possession”. Smith v. New England Aircraft Co., 270 Mass. 511, 170 N.E. 385. Right of privacy is primarily restraint upon unwarranted governmental interference or intrusion into areas deemed to be within protected “zones of privacy.” Industrial Foundation of the South v. Texas Indus. Acc. Bd., Tex., 540 S.W.2d 668, 679.