Obnoxious customers cut in front and are invariably rude, loud and intimidating, figuring that lowly and unassuming checkout clerks won't stand up to them. Moreover, disabled people often think that they are entitled to cut in front of pregnant women at the checkout line reserved for both.
而企圖闖關的惡客總是蠻橫無禮，先聲奪人，甚而大聲咆哮，他們認為我們這些「位微言輕」的收銀員，是沒有任何嚇阻力的。另外，優先櫃台的殘障人士往往自認比孕婦更具優先權，當每個人都自我膨脹時，糾紛就會無可避免的接踵而至。