Anyone who has travelled, even a little, has likely encountered one of the scams listed here: Tourist Scams I’ve Fallen For (And How to Avoid Them). I know I have run into the Overly Kind Stranger scam, and I have been lucky to avoid some of the others, like the “It’s Closed” scam.
The list in the article are worth reviewing regardless of how often you have travelled. The best way to deal with them is to know about them, expect them, and have a plan to deal with them.
Good luck! Don’t get scammed.