It isn't clear these accounts are all being used in any high profile manner. For example the @L account mentioned in the article has 0 followers, follows 1 acc

It isn't clear these accounts are all being used in any high profile manner. For example the @L account mentioned in the article has 0 followers, follows 1 account, and has their tweets protected. I just started plugging letters in and saw that accounts @B, @C, @D, and @E are all suspended. And considering these accounts were seemingly hijacked by exploiting Twitter's inability to identify the original account holder, I'm not sure Twitter actually has a way to determine who that should be conclusively.