How do human beings cause suffering in 'Today's world'

Do you know of any liars, cheaters, thieves? I assume you do not know child molesters, or s, or masochistic predators.

Do you know of loan sharks? Or real estate salespersons who shade the truth, or hide it?
Do you know of "financial planners" who use their position of trust to make personal gain?
Have you ever bought a used car?