In particular, he's using the name and (slightly redacted) bio of the main character from the TV show Dark Justice.
I don't believe it is.
As far as I can tell, it's only the user's profile that's based on the TV show character. There are very few rules about what you can and can't put in your profile, and none of those rules say you can't mock up your profile to look like a fictional character.
If they were actually trying to role-play as the character, that would be a problem, but their network-wide contributions appear to be genuine and in their own voice (albeit of dubious quality). Therefore, I don't believe that their profile is noteworthy, or that anything needs to be done about it.