I'm not familiar with the specifics of his case.
I think Twitter, similar to the Internet, is a platform for speaking. The dispute resolution aspect of identifying the speaker you're talking to certainly has its challenges. I'm not sure Twitter has a role. We have rules that govern the use of our platform, so of course, we expect that the people using our service are in compliance with our rules. If it's speech that's otherwise in compliance and not unlawful, the users are going to have to find ways to resolve their disputes. Unfortunately, if it goes into the court system, this is a challenge in bringing litigation.