[galfarragem]

> They sell a lot.

They sell a lot because they will force people to buy whenever possible. Most people buy it to be left alone.

> Police leaves these guys alone because there is no real crime. Scamming tourists is hard to persecute. Not worth it!

Often there is crime: forcing people to buy it's petty crime but most will not complain unless there is violence. It's nearly impossible to jail them with the actual political zeitgeist, making it a waste of time and money. This impunity leaves room for retaliation also.