What piece of personal information about your therapist would make you think less of them professionally?

Another thread made me wonder this. Never mind how you got the information - you suddenly know a piece of personal information about your therapist that affects your opinion of them as a professional. What would that information be? Some kind of crime, some kind of personal foible, something against your own individual moral code, etc.?

For some reason I'm thinking "toe fetish" but that might be the insomnia talking.