A special page is needed to allow a user to see and, if necessary, revoke their OAuth 2.0 grants.
I kinda wish we could do this without reinventing the wheel (ie a separate version of SpecialMWOAuthManageMyGrants)
But as OAuth 1.0 and 2.0 are standalone, no dependancies... This would require something in MW (or somewhere in common) for "managing"/displaying this, and allowing extensions to display stuff on this page
Probably excess complexity etc