Yes, I thought using GJ could be a way but it has no fields, and as you just answered my other question there is currently no way to the profile of the group owner and I need fields to get structured data.
Creating the page profiles don't make me the headache, that can be done. The problem is to allow a viewer updating a profile he owns without beeing a moderator. Don't you think I just could add the viewing user to a special moderator usergroup via auto action on a condition like
if the viewed profile is declared as "page",
the viewers user_id is equal to the owners user_id stored in a profile field,
add the viewer to the moderator group
What trigger should I use to try this?