How to block usernames that provide false sense of authority? e.g. “YC_Admin”

Does anyone know of a good methodology or library that is set up to detect names that provide a false sense of authority? There are a lot of impersonation attacks coming from within social networks themselves where attackers have names like "Support System" "[Company] Support" "Technical Help" "Admin Team" These are hard to detect and if you go too broad you might ban legitimate names. I was wondering if anyone has experience with either a library or implementation method. A few examples: 1. Steam usernames / group names can't have "Support", "Steam" or "Valve" in them. 2. I'm sure Amazon bans the word "Amazon" in their forum usernames.