This is not unprofessionalism; it is poor UX. The sensible backlash to the Nickelback feature is that is was set "by default," not that ripping on Nickelback is a humorous, widely accepted activity. This app could have retained that "cleverness" and "easter egg" vibe by keeping the setting but not having it be active by default. With proper UX considered, the backlash in this case could have been avoided.