We regularly do that, when an account goes inactive (not login into the forums for more then 31 days is considered inactivity) it is first suspended, and if the owner does not request unsuspension within a set period of time the accounts are terminated.
You are welcome to sign up for a new account if you wish. Make sure you login to account panel at
http://x10hosting.com/control and start the sign up from there to have it linked with your forum account.