[re: "Most people who post here subscribe to the list, so they will receive
any response you make to the debian-user list. If you send to the list
and to them, they get two copies of each message."]
Just a note on email addressing:
I was using gmail, with it's built-in interface. Although the default reply setting was set to "reply all", for some reason it automatically adds the email address of the last person to reply to a thread, in addition to ALSO replying to the whole list.
If I don't remember to manually edit the "send to" address line, someone gets an extra treat in their inbox.