You are visiting Mexico City and a man with perfect English approaches you. After a few amiabilities, he claims is an US Army veteran who has just been deported, the day before.

He goes on about the unfair practice of the US Government to deport Mexicans who served in the US military. After a compelling story, he asks for a few dollars, to get a bus ticket to one of the nearby cities, where apparently he has some family.

How to avoid: if his pitch is flawless – just like a car salesman’s – you know he is doing it several times a day. Just ignore him and tell him you don’t have any money to spare.