I don't think many of us on HN want to use email as a ToDo list, but there are other people that we work for or with that tend to use email in this way. For exa

I don't think many of us on HN want to use email as a ToDo list, but there are other people that we work for or with that tend to use email in this way. For example, my father is a fortune-500-exec-type (and an engineer), and he can't seem to grasp the idea of using a unique subject line (this led me to tell him, "don't email, just call"). There are also people that use the "email this article" function to share articles with you; I immediately delete such emails (I don't do html email), and let them know, but they persist. The issue reminds me of thread-jacking on forums leading to the idea that "forum software is broken." In other words, there are a myriad of poor choices being made by people that either cause security issues, or inefficiencies using email as a medium that is suboptimal.