I dunno - she's always been Batman's most loyal disciple (when she's written correctly, that is), and anyway, there are precious few civilian crimefighters out there. There's a reason why they usually wear masks - if you kick ass and take names just as yourself, you leave yourself open to being sued, being charged for damages for every window you break in a fight, etc., etc. That's a lot to handle, especially at Cass's age. I don't think she'd go for that.