I’m not really sure why developers of fart apps are automatically off limits or embarrassing.
Regarding Shoemaker, maybe Apple hired him to direct the App Store because he can run a massive online marketplace, and not because he's a talented or creative app developer.
A great developer might be wasted at the position Apple were hiring him for but a little experience might be quite good, so the first point could even be positive for him. Whether that second point is true can more or less be sorted out in the interview.
Are you really confident in assessing this person if this is the only thing you know about him? I’m certainly not.