Is anybody out there?

Why do people write notes or letters before they commit suicide? I mean if no one listened to them before what makes them think someone will read or care about the words they left behind? It is obvious that the suicidal person will never see the reaction to these self imposed death sentences. Nor will they know if anybody cared to correct their spelling or comment on their commas. Will someone take time to paraphrase their paragraphs? Will one single person hyphen their death at all? I think a few people might make comical references linking them to their colons and semi-colons. Will all their memories and ideas be buried in coffened parenthisis? Whatever! The final result isn't in a long or short sentence, only that their life has ended period.