- Don't travel here. (But where's the fun in that?)
- Be prepared to make a fuss and do so everywhere you go.
- Rehearse having controlled tantrums bordering on rage and let them loose. Think no scam is too small for your righteousness.
- Demand ro see a menu when the bill comes and check every point while occupying the workers for as long as possible.
- Ask the price first and ask people around you if it is correct.
- Have a friend dress up in a tourist police cap and have him arrive just before the bill comes.
- Ask for a paper copy of the bill and make it obvious you are posting it online.
If you have any other ideas let me know.