Delete authority for IFS file

If *PUBLIC has *RWX on a file in the IFS (/root file system) and its containing folder, is there any reason a user, who is NOT the owner of the file, should not be able to delete it via DEL or RMVLNK?

RMVLNK OBJLNK('/TMP/MYFILE.PDF')

CPFA0B1 Escape 40 01/12/16 16:00:00.603913 QP0LCCFN QSYS
From module . . . . . . . . : QP0LCEXH
From procedure . . . . . . : qgc_sendpm__Fv
Statement . . . . . . . . . : 17
Message . . . . : Requested operation not allowed. Access problem.

Cause . . . . . : An operation was requested on an object, but the operation is not allowed in the context of the request. Appropriate privileges may be required or the file system may not allow an operation to the selected object.
Recovery . . . : Check the name of the object to make sure it is correct. Correct the name and retry the operation. If trying to remove a directory, use the RMVDIR command. If trying to link directories, specify *SYMBOLIC for the LNKTYPE parameter of the ADDLNK command.

-mark