You may have heard that users have registered trademark terms on Twitter, and have also impersonated celebrities or other brand names. This is a consistent and ongoing problem for Twitter. The bigger problem, however, is Twitter's statement with regards to liability and their simple process that is required to be undertaken if, in fact, you want to have a trademark infringer or an impersonator removed from their service.
Well, what are these problems? Twitter first requires that any complaint, whether trademark or otherwise, be submitted from the domain name of the complaining party. So, for example, if you are an attorney that represents a party that owns www.something.com, then the attorney must be granted an email address from www.something.com. This requires the client to provide their attorney with an email address.