Around 75 percent of the 3,271 unruly passenger reports received by the Federal Aviation Administration (FAA) since the beginning of the year stemmed from people refusing to comply with federal mask mandates, according to the agency. The FAA said in a July 6 statement that the agency has, so far this year, moved forward with 540 cases that showed “potential violations” and initiated enforcement action in 83 of those, while proposing more than $682,000 in fines as part of its so-called “Zero Tolerance” policy targeting unruly behavior. The agency singled out several incidents in the statement, noting it has levied $119,000 in civil penalties against nine passengers in cases that include refusal to wear facemasks, threatening fellow travelers, assaulting flight crew, and punching a woman holding an infant. In one case, a male passenger on a Dec. 27, 2020, Frontier Airlines flight from Tennessee to Florida was fined $21,500 for …