If someone you are sharing files/directories with fails to set the permissions right, there are two ways to get those permissions fixed: either have them fix the permissions themselves or appeal to staff with privileges to change them for you. Unfortunately, the policy regarding this on the faculty and research machines administered by LCSR is that filesystem protections must be respected. Any changes in permissions or circumventing of filesystem protection must be approved by the department's Executive Committee. As this can take some time, it's most advisable to have people fix the permissions themselves if at all possible.
~watrous/fix-group-access [-v|-d|-rw] <directory>where <directory> is the directory under which all files and other directories should be shared. "-v", (verbose) if specified, will report on the steps being taken. "-d", (debug) if specified, will cause the commands to fix permissions to be printed to the screen rather than being executed. "-rw", (read/wrote) if specified, will cause the commands to fix permissions to be printed to the screen rather than being executed.