Allow administrators to change user flags

I'm using an "rsvp" Flag on event content-types to let users say if they will attend. (instead of rsvp, signup or cck_signup modules on Drupal 7).

I didn't find a way to let administrators change the list of attendees. I wrote a bit of custom code that adds an "unflag" link next to attendees names and an autocomplete textfield to add users. It's very early code that works for me, but I'd like to make it more general if something like this doesn't already exist. Maybe it's possible with VBO and I missed something?

I called the module "flagmanage", but perhaps it should be called flag_manage in line with other similar modules. Or maybe it could be rolled into the flag module itself.

Thoughts?