Wow, I heard about that story too.
There were 4 tourists, 2 brothers and their wives, they came to visit Rome and have paid 64 euros for 4 ice-creams.
Now, I don't really know what to believe. A lady who works there said that the prices are right in front of your nose and they could have chosen a cheaper ice-cream. Then they also say that there were others who were not happy about the cost of ice-cream (some Spanish tourists were complaining about the same gelateria a week earlier).
I tend to agree with the Italians and not with the tourists though.
First of all, the prices are exposed for you to see. If you see that an ice cream costs 20 Euros, don't buy it! You then choose the ice cream, the cashier tells you it costs 64 euros in total, you give her the money but it's still you who complains... why?
A "normal" ice cream, one you buy at a gelateria, one that they make in front of you (figuratively speaking, they make it in the back where they have the kitchen
) and they make it with their own recipe, costs about 2 Euros, even less if you buy a small one.