How do they measure detriment? One interesting thing I felt while reading the article was that many of her complaints like having to sweep up syringes or people

How do they measure detriment? One interesting thing I felt while reading the article was that many of her complaints like having to sweep up syringes or people defecating in the street would not be registered as crimes. How would you even quantify the feeling of frustration at seeing someone defecate next to a car in the street. Seems like a very complicated issue to measure scientifically.