There is plenty of circumstances where people are not willing to fight for $10.

* You may be on holidays and may want to avoid arguments with strangers.

* You may be after a long flight, jetlagged and/or simply too tired.

* You may be running late for a plane or train and have no time to wait for the cops.

* You may not speak the local language.

On the other hand, leaving a rating or review is a lot simpler and more commensurate with $10.

I don't think you need to actually fight, just walk away. I'm thinking specifically of Las Vegas, and you've taken the cab from the airport to your hotel. Is the cab driver going to run through the lobby of the Bellagio and tackle you? No. Who is the hotel staff going to side with, their customer or a cab driver where they know cab drivers routinely rip off their customers?

The cab driver is exploiting your reluctance to make a fuss to get a small amount of extra money. You can turn right around and exploit the fact that by breaking the law they've removed any recourse they have for getting you to pay. If enough people did it, eventually the scam would not be worth trying anymore.

There are certain countries you shouldn't do that for plain security reasons.