If it's found out that a driver is carrying on the job, they will let them go. Let's say the driver is just sloppy at concealing it and a gunphobic passenger happens to catch a glimpse of it and reports the driver or worse is triggered by it and says they were threatened by the driver when they weren't. The company will let the driver go because drivers having guns is against their ToS. It's not unfathomable, and while it should be a clear cut court case ruling in favor of the driver's 2A rights their policies unfortunately has been allowed to fly.