Going here as anonymous:
I have a link to "Request friendship from this user"
but then I get "You must be logged in to use this feature"
A- the link should only exist when the user is logged
in and has the permission to request friendship.
B- the link should say: login to request friendship
(only if this feature is activated). This second
option is more complicated because when people are
anonymous, we don't know when they do log in, if they
will be part of a group which indeed is allowed to use