I'm having some problems on giving attention to usernames. Most of the things written over the Internet is anonymous for me. Until I really want to give attention to what is written and if it's a credible resource and check sources. If something is anonymous than it's not credible default. So this leads me to not recall usernames. I'm a bit sorry about this.
Avatars would really help me.
Interesting observation regarding avatars, I was planning to include them in a current project... but having less recognizable user accounts might help with getting users to focus on the content.