Support Forum

In general you are right, but in my specific case I just cannot have standard thinking as I'm working on a website where everything is already built all on top of a unproper use of wp roles. And for the workflow and a lot of other reasons, there's no way to allow users (except admins and editors) go in the backend.

no real sense in being an sp admin and not having access to the back end…

Infact I will not have any forum admins, just moderators. But as I need some admins, I will use "grey accounts" (anonymous accounts, users that will not be shown in members list)

wp users with a wp role of subscriber can be an sp admin…  then they can go to the wp admin and see the sp admin panels… but they will ONLY see the sp stuff

In the website I'm working on it is already done that just wp roles of Admin and Editor can go in the backend. Every other user will be redirected in front page, so it's useless to have any sp admin that is not a wp admin or editor (i know I'm not forced to map wp roles and sp groups).

so you do NOT have to change the wp role of a user to make them an sp admin…  they just get the sp admin capabilities added to their user with NO modifications to any wp roles…

I know, but as sp admin can manage their admin stuff just in backend for me it's pointless to have sp admins, as I cannot allow forum users to go in backend.

 you should create a dummy user...

Believe me, I have tons of dummy users, and I'm actually using then on a dummy website (a mirror copy for development). It's not my first time I deal with users, capabilities, etc... actually I think to know this stuff pretty well, but as I said, in this project I have to follow a forced path.

Anyway, many thanks for your advices, support in this forum is awesome!
you are not satisfied in just giving solutions, you want users to actually improve their WP skills, it's amazing!
I strongly support your choice to go with membership site model. If you need a testimonial, I'm here!