Organic groups joining strategy Does anyone know how I can force a user to register before being allowed to join an organic group?

Presently, my users receive a link which takes them to a page with a join button. Once they click on the button they are either added to the group as registered members or presented with an "error" message which states they need to register for anonymous users.

I would like to automate the process for those anonymous users.
Try this go on to Configuration > Organic Groups >OG Global permissions and Uncheck the fields that u wish to hide from  non-members ...