In 202X, the world where smartphones has expanded further than it is now.
Use a smartphone while walking. the so-called “walking smartphone” has become a social problem due to the large number of accidents.
And so “walking smartphone” regulations has been introduced.
It is said that a well-behaved citizen selected from the country can act as a private observer and give caution and punishment on the spot to people who are texting while walking.

What kind of punishment would they get?