http://developers.facebook.com/blog/post/35/

I skimmed it for a link and clicked. The page loaded, I clicked the big button in the middle that said something like "Make [Your Name] a Test Account"...

...and my Facebook account was made unable to interact with friends and apps.

My real Facebook account. The one I use (well, formerly used) to admin multiple apps. The one I formerly used to keep in touch with hundreds of friends.

Instead of making a test account for me, it had made a test account out of me.

I contacted Facebook support, but other developers on the forum have done so with no luck. This is sickening. Who in their right mind creates a button labeled "create test account" that irreversibly destroys the account of the person using the system?

And who, having committed such an atrocity of design, doesn't even help the people who accidentally click it? It is incomprehensible.

[Edit: It gets WORSE, if that is possible. The method that blog post talks about is outdated. It shouldn't be used any more. There is a much cleaner way to manage test users through official apis. They could at least edit that post to point to the up-to-date information. ]