When a student has an 'friend' relation added (ex: for pickup purposes), there is a good chance that the friend may also be a parent (of another student). As it functions currently, in Profile Relationship Access, if a parent *role* has access to edit a student role that they are related to, they also then are able to edit the information of the 'friend' relationship, as given permission by the parent *role* access.
An additional check of relationship type (as defined when you adding a relationship to a user's profile) would greatly improve this functionality.