Would a car rental company permanently ban a customer and offer no way back – ever? He was stunned to read that his favorite car rental company no longer wanted him as a customer. The car rental company banned Joe for using these “Earned Free Rental Day” certificates that belonged to someone else. This was an honest mistake.”An honest mistake was an unusual way to describe what the car rental company rightfully considered theft of services. Verbally abusing, threatening, or assaulting company employeesTaking your anger out on car rental company employees guarantees you a swift trip to the blacklist.