Yes. I interviewed and eventually hired the developer of a name-brand open source project years ago. I asked him about parts of the code, and after I hired him

Yes. I interviewed and eventually hired the developer of a name-brand open source project years ago. I asked him about parts of the code, and after I hired him he confessed that he thought it was game over right at that moment of the interview: he was embarrassed about the PHP he'd written. I didn't care a bit. He was a fantastic engineer, he recognized what he no longer liked about his old code, and most importantly he created and shipped a huge, popular project. Very few people can say that. Claim it, be proud of it, and be prepared to talk about the mistakes you made. That engineer, by the way, has now been at Google for years. He's doing just fine.