While you shouldn't become a hard-nosed nasty person, you should receive unsolicited offers of help with polite caution, and, when you are reasonably certain that you're being scammed, there's no need to be polite in fending it off: feel free to walk away or speak firmly at the person.Yelling for help could be necessary, but it will often just attract more (unwanted) attention.Pretending they don't exist, which entails not making eye contact, not walking faster, not saying 'hello' or 'no', will often humiliate them or tire them out without frustration on your part.

In some cases, you were dealing with hardened criminals.

If you think what happened to you was illegal and the police are trustworthy, report it, otherwise, just chalk it up to experience.

Note that if you wish to make a theft-related claim against an insurance policy, you will generally need to make a police report within 24 hours and keep a copy for your insurance company.

There are common scams that occur in many places that the traveller should be aware of.

These are designed to get your money or business from you under false pretenses.

They fall into three categories: overcharging you, deceiving you or coercing you into paying for a service you don't want, and outright theft.

Prevention is based on knowledge: researching your destination will both alert you in advance to scams in the area and let you know what the usual prices and truly good sights are so you will be less reliant on the approaches of helpful individuals when you're vulnerable.

These scams are based upon the idea of offering you help or advice that is actually deceptive, trusting that you will rely on the scammer's "local knowledge".

They usually involve giving advice that results in you paying for something that you otherwise wouldn't or going somewhere you don't want to go.