Voices: If you are rude to restaurant staff, it tells us all we need to know about you

Apparently, James Corden – who had been allegedly banned from a New York restaurant, Balthazar, for supposedly treating staff “poorly” – has “apologised profusely” to the restaurant’s owner. But let’s pause for a moment, before we lay the matter completely to rest.

Yes, the owner (on whose claim this entire allegation rests, as Corden has not yet publicly spoken out) has since said he “believes in second chances”, but whatever the truth of this particular matter, it’s worth looking at what we can learn about human behaviour more generally.

Whenever any of us are short-tempered or snappy, it is right that we must apologise. And when we are witness to rudeness from fellow diners, we shouldn’t discount the possible reasons for anyone’s less-than-savoury behaviour: perhaps that person had a bad day; perhaps they heard some bad news preceding these individual incidents and weren’t feeling themselves. Perhaps the person who was rude went home afterwards and kicked themselves for the way they acted; spent a sleepless night ruminating and regretful and pledging to always #BeKind. Or perhaps – and here’s a counter view – we shouldn’t let those who are rude off too lightly.

Before any of us are ill-mannered or unpleasant, we would do well to remember The Waiter Rule. It is a simple philosophy, an adage (and if you Google it, you’ll find it attributed to numerous sources ranging from the author Dave Barry, to Raytheon CEO William H Swanson). It’s simple, but it’s important. To me, and to my colleagues who have also taken against basic rudeness, it is a rule of thumb; a way of life.

It goes like this: we should pay close attention to the way people treat those who serve them – cleaners, waiters, porters, receptionists, delivery drivers. It tells you an awful lot about what kind of person they are.

And don’t just take my word for it – I spoke to a clinical psychologist, who wished to remain anonymous, about what we can learn from those who behave badly to those they may judge as their “inferiors”.

“It’s reflective of a culture that sees people as commodities and the self as central,” she said. “A dehumanisation takes place that aids a sense of superiority and power. The invisibility of others who work in the service industry may indicate a person who has had so much provided for them that they don’t ‘see’ what work goes into accommodating them.

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“It’s no different to them that it’s a person, a human being – they see them in the same way that they might see an air conditioning unit and expect it to work effectively to keep them cool. This likely has a significant impact on the ability to empathise or build connections outside of self-serving, transactional relationships.

“If you don’t serve your ‘purpose’, you become worthless or invisible – and are treated as such.”

As Swanson once said, you should watch out for people who have a “situational value system”. He said we should all pay attention to those who can “turn the charm on and off depending on the status of the person they are interacting with”. This, according to psychologists, can prove telling – because our value systems are often revealed through our behaviour, and influence what kind of choices we make.

So, when it comes to getting the true measure of a person, we would do well to watch out for these kinds of outbursts, and to ask vital questions of them – and, indeed, ourselves – if it does.