Yup, certainly possible. (How plausible? I don't know. Most people don't encounter many cases of people getting fired -- or nearly getting fired -- for being insensitive and don't get enough details of those cases to justify a change one way or another to their offence thresholds. It's not perfectly obvious, by the way, that having more cases like this creates an incentive to be more easily offended. It might go the other way: "No one is getting fired for being mean to us! We must make more fuss!")