Does three DUI's justify revoking a teacher's license?

What if the teacher is, by all accounts, really, really good? And the DUIs are in 1987, 1997 and 2001? And are all on the weekend, with no evidence -- whatsoever -- that she ever, ever drinks on the job or is hungover or the like.

I'm conflicted. On the one hand, multiple DUIs are incredibly bad. It shows a real lack of judgment. Huge. Especially when at your last DUI you're blowing a .25.  
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