Question about RIDC Service call using admin context to get info on another user

I wrote a web application that allows users access to a document metadata model more complex than that allowed by the Content Server. After a user searches for and selects a document to view, the user clicks on a button that uses the user's context to make the RIDC service call to GET_USER_PERMISSIONS to return a resultset "SecurityGroups". I then compare the LDAP groups retrieved at user login to these security groups to test if the user has access to viewing the document. If so then an admin context performs a GET_FILE service call on the file. I built an