Can you get fired for that?

A waitress in Ontario, Canada was fired after she shaved her head to raise money for cancer research. Apparently, it didn't matter that her father had died of the disease. She was canned because her appearance was disturbing to customers.

Bosses have incredible freedom to fire for almost any cause. A Chicago car salesman was fired after refusing to remove a Green Bay Packers tie that was infuriating his Bears-loving coworkers. We should mention the Packers beat the Bears the night before to advance to the Super Bowl.

Unless such a warning is specified in your contract -- and most workers don't even have a contract -- your boss can terminate you without even a hint of displeasure with your performance.

A 73-year-old Walmart greeter in Florida was fired after briefly grabbing hold of a customer's sweater during a Black Friday stampede.

In the U.S., Your boss has the right to do just about anything he or she feels is in the best interest of the company. If you don't like it, that's your problem.

In the United States, employers have the right to record and monitor employee phone calls that have a business function. Conversations with co-workers qualify as business discussions. If you're going to badmouth your boss, remember to hit the "mute" button.

Even worse, if you have a data entry job where constant typing is required, your boss can install software that monitors and records keystrokes per minute. If you don't keep up your pace, you can get fired.

Web-based e-mail accounts communicate across your office network, which means that your boss can monitor the contents of your personal e-mail as easily as he can monitor the pages on your Web browser. And it's perfectly legal. If you trash talk your company or share confidential information over a "personal" e-mail account at work, you can certainly be fired.

The only way to get fired "with cause" in Brazil is to engage in illegal, unethical or wildly unprofessional behavior. If a Brazilian company wants to fire an employee "without cause," it will have to pay for any unused vacation days -- Brazilians get 30 days for every 12 months of work -- plus the annual holiday bonus (another month's salary), plus give the employee at least 30 days written notice.

Both countries had laws on the books to punish sexual offenses like physical abuse and rape, but the pair of 2012 laws made it illegal to make sexually colored remarks and jokes or display sexually charged material at work. Not only can workers in France and India get fired for such behavior, but they could face fines and jail time.

An accountant in New Zealand was fired after sending too many e-mails using ALL CAPS, bolded and colored text. Her boss claimed they set a "confrontational" tone. Even if you think you're being helpful by calling out important information in ALL CAPS, your co-workers might think you're YELLING.

Even heroes get fired. A waiter in Fort Lauderdale, Fla. ran out of his restaurant to tackle a knife-wielding carjacker and hold him until the police arrived. When he returned to work, he was fired for walking out on the job.

Sadly, human resource experts say it's the quiet ones who are often the first to go during layoffs. Even if you do everything you're told, companies are looking for people who have new ideas and are motivated to move up the ladder. Also, if no one knows you very well, you're easier to can.

Just because an e-mail is deleted from your inbox doesn't mean that it's deleted from the office servers. Most companies back up and save all network data, even deleted e-mails. If your boss wants to find that e-mail badly enough, she will.

Office property is office property, no matter where you are using it. The best rule of thumb is to always treat an office computer as if you were at the office. Nothing pornographic, nothing illegal.

This is one of the biggest mistakes made by employees, young and old. If you share pictures, videos or opinions that make you look crazy/lazy/drunk/stupid, that reflects badly on your employer. Facebook can definitely get you fired, except in special circumstances.

Whistleblower laws in the U.K. can only be applied in cases where the employer is breaking the law, endangering the health and safety of employees or the public, or polluting the environment. High prices are bad for business, but not unlawful.

Everyone gets bored at work, but publishing that fact to the world reflects poorly on your motivation, not to mention, "What are you doing on Facebook anyway?" A teen in England lost her job over this very behavior. Then again, why was her boss on Facebook, too?

The chain of command is a serious thing in most workplaces. Any time you go over your boss's head, you risk getting fired. If you choose to do it, make sure you have undeniable proof of your boss's incompetence, something that will get him fired before he can get to you.

Under U.S. workplace law covering both public and private employees, the courts have generally held that you are allowed to share your religious beliefs as long as they don't offend your co-workers, create safety issues, impact the profitability of the company, or misrepresent them as the views of your employer.