You know, I looked up websites from another country - they contain advices about writing letters to prison. In general, women who write letters to prisoners are different, and the motives can be different.
However, this system, writing letters or emails, to jail, is viewed positively by the community. Think of it. Many people are jailed in this world. Eventually, they will get out and start a new life. For them not to fall into despair and not to grow totally wild, emotionally, letters from the free world, even from the people they might never know, are considered similar to good psychotherapy. People are lacking emotional contact in prison, so letters help, immensely.
I never regarded letters to prison in this light, but I can see the point.
However - it is very sad that instead of supporting some people who were jailed because of stupid actions, drugs, for DUIs, theft, even, something where rehabilitation is possible, the whole world is supporting a man who has killed his wife and kids.