CLOSE request not checked in RC

Hi, in rc_main.c in svn code CLOSE request is not checked at all
(always returns DON'T CARE) is this right?. Could not exist cases in
which an owner want that one object still opened?. Is this behaviour
right?

Example:

User 1 create a pipe
User 1 let a user 2  their pipe (rw)
User 1 forbids user 2 to use their pipe.
User 1 let user 3 to use their pipe.
User 3 close their pipe
User 1 has their pipe closed.
User 1 can't lend their pipe to anyone.