You just answered your own question: "In some multi-user environments .."
On my system at home (where I'm the only user) I don't want anything
scrolling (or being cleared) off the screen just because I've logged
out.
At work, it's a different story.
And somebody had to choose the default and leave it for we who don't
care for it to change our own environment.
Cheers,
Pann
--
What's All the Buzz About Linux? L I N U X .~.
The Choice /V\
http://www.ourmanpann.com/linux/ of a GNU /( )\
Generation ^^-^^