I give you a link to your personal Perlmonks Account Disable Page. You get to choose
there what information remains and what information gets deleted. You also get to enter the text that will be displayed during your indeterminate leave of absence.
The button is at the bottom of the page, labeled "Stumbit", as is a Monastery tradition.
As a precautionary measure, to permanently disable your account, we require you to enter a "security code" into the field labeled "password". The current security code is 0.
I'm sorry - I didn't test the part where you actually set (and save) the password in your account through the user interface. It is now also possible to actually update your password and set it to a false value. So if you try again, you will find that you can lock the door behind Zen, but The Monastery Gates will remain open even without a name.