Dear "User Name",
We have no affiliation, neither with the Internet address nor the provider you cited.
It is possible that whoever is using that particular IP is trying to login using your username ("User Name"). In most cases, this is some kind of automated bot software. My guess in your case: the bot software uses a default username which happens to be the username you picked to register here.
Please understand that there are hundreds if not thousands of bots accessing MobileRead every day, many of them trying to do some kind of mischief. It would be a futile attempt trying to ban them based on individual Internet addresses (which is what you asked us to do in your mail).
We'd be more than happy to assist you in changing your username to something different, less generic and less likely to be targeted by bot software.