I think we're already accomplishing this. The [X-FB] in the subject warns someone who is not interested in side trips to skip over the message. Someone who really disliked side trips could put in an "automatically delete" filter for messages with [X-FB] in the subject line. Mark Goodes tedd@... wrote: > But, what I suggested would provide two lists that would be > transparent to both types of FB'ers. For example, at any time one > wanted to respond with a comment that is not purely FB related they > could by adding an [X-FB} into the subject line. From there, the > email would be channeled into the [X-FB] list and further threaded > from there. So, those subscribed to both lists would receive both > threads. But, those who subscribed to only the FB list would never > see any [X-FB] threads.