Alexander was upfront that employees should expect and demand support from their managers. "I know that it's common for restaurants to treat their customers like kings and their employees [badly], but that doesn't mean it's OK," he said.

"99% of people are nice, but the occasional rude client is unavoidable," Alexander from 'Woohoo inc.' said that there's no avoiding rudeness in the long run. "You can learn tricks to deal with them, and that's great, but no one should have to put up with mistreatment."

For Alexander, working in the service industry doesn't mean that others can walk all over you. "Having a service job does not mean that other people get to demean you or belittle you and managers must be willing to step in and protect employees' dignity and mental health."

Tipping's either a sore subject or a complete non-problem depending on where you live. In the United States, for example, tipping at a restaurant or a cafe is nearly ubiquitous. You're bound to get some weird glances and questions if you refuse to tip or if you don't tip enough.

I'll be frank. The US tipping system… is a bit weird. It's on the same plane of existence as not posting the full price of a meal or a product with the tax included. However weird forced tipping might be (and how it essentially makes customers, not the employers, pay a large chunk of the workers' wages), it doesn't change the fact that it's a cultural thing in the States. You just do it.

So not tipping someone or even poking fun at a server who expects a tip isn't the way to go. Sure, the entire system should be overhauled so that tipping isn't mandatory, but until that utopian moment, we're stuck with what we have.

Rudeness, however, isn't just linked to tips. Customers from hell find all sorts of ways to belittle servers. From namecalling and ‘flirting' to acting like spoiled, entitled children (no offense to spoiled and entitled kids). However, employees shouldn't rise to the provocations while also protecting their own dignity.

Earlier, I'd had a chat with Alexander from ‘Woohoo inc.' about what people should do when dealing with rude customers. “Keep your cool and remember that whatever abuse they're giving you is no reflection on you as a person,” he said.

“That customer doesn't even know you, so there's no way it could be you. But on the other hand, don't be subservient. Don't be afraid to stand up for yourself and tell customers that abuse is not tolerated. And if it persists, hand them over to a manager as soon as you can and let them deal with it,” Alexander explained how we should deal with problematic people. It's all about striking a balance between being professional and having a spine.

However, Alexander pointed out that not all customers who behave badly are bad people in and of themselves. There's a bit of nuance there! “It can be a good person having a bad day and that's why they're acting out.”