Restrict phone invitations from 3rd parties to videoconferences and notify the organizer if done

When you invite somebody to a videoconference it gives the invited people the option to invite too, even while entering through the web version. If they do so by phone, the call is taken from the organizer minutes, this can be done without the organizer consent. I propose to add an option to restrict that while organizing the meeting and some kind of notification to the organizer if the scenario takes place