[@robin-w Moderator 12 years, 7 months ago]

The display name is currently a user choice. You could disable that by some code, but you would need to decide what to display instead eg username, email etc. But this is now completely opposite to your starting point to “allow users to choose a name and avatar before posting on a forum”.

Perhaps it would be easier if you described what it is that you would like to achieve and why in both profile and in the topic/reply display, rather than specific queries without any explanation.

I will try and assist you further