Technically not a feature request, but still important in my opinion.
I suggest to modify the CjForum ad (e.g. in the official Joomla! Extensions directory) that currently says:
" One click signup and login process using Facebook, Google, Twitter and Linkedin authentication services."
While it's certainly possible to sign in with a social account, there's no way to sign up to Joomla! (and hence to the forum) using just the component.
You need to create a regular native Joomla! account first.
(seemingly a huge burden for most users nowadays)