My take on Hacker News feedback is don't ask people for feedback full stop. This place used to be great for getting valuable feedback and you still get decent feedback from some, but this place has become so negative that people will nitpick and call you out on the smallest things.

Case in point was a submission from a few days ago called Unsplash (http://unsplash.com) a guy gives away ten free high quality images you can use for anything every ten days. The first ten images were geared towards startups of his Macbook, iPhone and iPad. There were some, "Thank you, nice work"'s and then there were people complaining about it breaching Apple style guidelines because the phone wasn't face on, etc.

Take any feedback from this place with a grain of salt.