Flippa won't let me (or anyone, ever) close my account. What do I do?

I opened a Flippa account 13 days ago to check them out and maybe sell some of my domains. Then I decided not to bother. It turns out Flippa has no option on the site for account cancellation/deletion, so I contacted their customer support. They said:

  Your request (#xxxxx) has been deemed solved.

  To review, comment and reopen the request, follow the link below: 
  http://flippa.zendesk.com/tickets/35366

  Flippa Customer Support, Apr-26 08:31 pm (EST):
  Thanks for contacting Flippa Customer Support.

  For security and data integrity requirements, Flippa accounts cannot be deleted or closed.

  You are welcome to create a new account under a new username if required,
  but please be aware that under Flippa's Terms & Conditions at 
  http://flippa.com/termsandconditions, users are not to operate simultaneous 
  multiple accounts.

  Kind Regards,

  Flippa Customer Support.

I don't like the idea of keeping accounts floating around, especially in an active state. Since I have not initiated nor participated in any auctions, there's no reason Flippa's "security and data integrity" is at stake, so what's going on? I replied to that email to complain further, but got no response.

Do I have any recourse? I couldn't even find mention on their site that once you open an account, it's open for life. This is not good for your customers, Flippa.