I know this feeling all to well. My friends and I created a facebook group in 2005 that doesn't have a name- we managed to sneak some null characters through their filters. Our nameless group occasionally causes problems, including crashing the IOS Facebook app for about a year, but we didn't want to make a bug report because we thought they'd just give the group a name (ultimately one of our friends at Facebook filed a bug report and got it fixed without outing us).