I know you are not saying...In my experience, where a real name has its benefits, it also has a very negative impact on whistleblowers and activists who may not be able to communicate safely using their names, and we do want to cater to them.
When Twitter was first created, it was precisely to enable people to speak truth to power, and to provide people with a platform of communication to the higher levels of power that was unprecedented. We want to continue to encourage that use, but as you say, it's extremely important that we clamp down on fake accounts and impersonation, and that impersonation is not being used for abusive purposes.