this is rather silly and obvious, but i couldn't find anything in seaching
the old archives on geek-girl.com.
under solaris, scsi tape devices (/dev/rmt/*, which are linked to the st () x,x:
devs in /devices) are created with the permissions bits set to 666. this allows
a mallicious user with a login on your system to 'mt erase' the contents of any
tape devices connected to your system.
this is a tough one. i'll let you figure it out yourself.