Here's a super-obvious fix: Facebook should show you what they're deleting. It's easy to be confused about which user is currently signed in, even if you did c

Here's a super-obvious fix: Facebook should show you what they're deleting. It's easy to be confused about which user is currently signed in, even if you did create a new account you want to use for testing. So FB should have an intermediary step that says: WARNING: you are setting this account to test mode. That will involve DELETING its links to 354 friends (list some of them), 23 pages (list some of them), 5 years worth of status updates, etc.. Or simply don't allow an account to be set to test mode if it has more than 2 friends or 5 status updates (etc... some reasonable test).