Further to the above,

I am now retired but used to work for an organisation which was regularly criticised and the subject of so called "humour" and still is. Of course, much of this was arguably justified as far as certain individuals and incidents were concerned.

While I was assured that this "didn't mean me" and I'm sure they were being very sincere when they said this, nerves wre often "touched".
Yes, most of the time I "laughed it off" as I'm sure most bank tellers and others in less senior positions will do. However, that doesn't mean they don't have feelings and they will still be sensitive to such matters. Even if they don't admit to this.