I regularly do use rsh and rcp in my work.
and ssh/scp when needed (public network)
Do you work with a small trusted group, because many attacks come from
co-workers.
depends on assumption. For every business i work i assume that co-workers
doesn't harm and that's agreed with the boss.
With different assumption i would not just design everything different but
actually lock every single person in separate room, controlling every more
(because someone may just go to other room) etc...
I am not paranoid. If in any company you must fear that coworker is a
security danger then something is definitely wrong with that company and
it is not my job as an admin to fix it.
That's my opinion, i propose going off list.
And not with "free" email like @yahoo.co.uk about which you should be 10
times more feared than over your untrusty coworkers.
my .procmailrc redirect all "free" emails like this to /dev/null.