This is all true, but there are many times where this is not possible. On many of my installs the client will have a CRM or other software that sends emails on the users behalf. When email is sent from these external applications it would be nice if the users could see them in their sent items. If the message is passing through via SMTP already it seems pretty simple to just drop it in their sent items.
By reporting abuse, a moderator will be asked to review the content of this interaction to take further action, if necessary.