If one lets say loses their account information(has happened to me before) is starting a new account forbidden? Even if can't login to old account? Or if that happens can you start a new account as long as you don't use your old account at all?
“It is interesting actually, what if you lost your handle and do not remember what e-mail was used before? Will support ticket system allow to ask for Asims to track your ip and tell your lost data?”
Yes, IP address can be used. A portion of the handle/email can be used as well (the search supports wildcards). Really, any field you entered can be used. If you remember a partial post you wrote, it can be looked up in the forums. If you know your old IRC nick, your IP can be pulled from the IRC logs and cross referenced with the SWC accounts. It's really not hard to retrieve old accounts.