Answer:
They do something worse than physical harm.
Explanation:
Instead of just killing or maiming people they ruin the spirit and morale of a person, it effects them mentally rather than physically.
1. address your letter to the person
2. quickly get to the point
2. state what they could do about it
3. support it with other things
4. give them a time limit
5. finish it respectfully
and yeah i think that's it XD