More expire/adaptive thoughts/questions

[Wesley.Hardaker@sphys.unil.ch]

Ok, to quote the manual:

    By the way, that line up there about Gnus never expiring
    non-expirable articles is a lie.  If you put `total-expire' in the
    group parameters, articles will not be marked as expirable, but
    all read articles will be put through the expiry process.  Use
    with extreme caution.

1) Why is this a bad idea (ie, why extreme caution)?
2) One guess:  does it zap cached or ticked articles?

The advantage I see of this is that then you can have articles work
with adaptive scoring again and marked as read, etc, but they'll still
get deleted...

also

3) If I do something like, say,
     find ~/News/nnml/group -name '[0-9]*' -atime +14 -exec rm {} \;
   What does this do to gnus?  IE, is it possible to run a expire cron
   job safely?  Or does this mess up the active/overview files?

Wes