"Including the forum user roles in the roles that can be assigned by profiles would be a smart way to control the access to a forum of users connected to a profile. I for instance want users with the profile ""Guest"" have only spectator rights while users with the profile ""Members"" can write topics and replies. That would be easy to accomplish when Profile ""Guest"" assigns the forum user role ""Spectator"" while the Profile ""Member"" assigns the forum user role ""Participant""."