Your IP address, SharedIP, is registered to Some organisation, and may be shared by multiple users, so you might receive messages that are not intended for you. In the case of organizations using proxy servers, this IP address may in fact represent many users at many physical computers.
To have your own userpage and gain access to other special features, create an account! It's fast and free. In some cases, you may temporarily be unable to create an account due to efforts to fight vandalism, in which case, please see here.