Yes, well,  if you  find yourself cross-posting  things over  an extended
period of  time, as opposed to  an occasional discussion on  a particular
topic, there is clearly something wrong.  Since your topic is relevant to
multiple lists it  is likely that many people will  be subscribed to more
than  one of  these lists  and they  probably aren't  looking forward  to
multiple copies of  a discussion over an extended period  of time. So the
best thing  to do  is select a  list to hold  that discussion  and invite
people who are interested to join it.
 
  Eric