>> your true complaint is that you cannot chgrp a file to a group of
>> which you are not a member.  which is perfectly correct.
>
>Actually, my true complaint was that I _can_ create a file with a
>group I am not member of just by copying it to a (writable) directory
>with that group.

that may be true, but that's the way it's done.  as for the
permissions problem, you can certainly chgrp it to something else.
it's not a security problem at all, since there's nothing you can do
with or to the file to exploit the perceived extra group.

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