A McDonald’s employee has shared on social media a little-known insider secret, revealing how drive-thru staff know whose order belongs to whose car—as literally hundreds of vehicles patronize their outlet each day. It turns out, computerized eyes and ears are keeping track of customers as they cruise through and make their orders. TikTok user Katie, who goes by the handle @katieeclarkee, dangled the question on her social media account. “Ever wondered how McDonald’s know whose car is whose?” she asked. Katie, 17, who works at McDonald’s part-time while attending college, then provided the answer to that mystifying question. “There is a camera and it takes a picture of you and your car,” she shared alarmingly. “So maybe don’t pick your nose when you order, because we see it and we judge you.” A bit of sound advice from Katie; it’s funny but also somewhat concerning. Her video has since gone viral, garnering over 5 million …