Where can I bring my camera in public without looking like a moron?

What does "useable" mean?

- if it means a shot that could be enlarged to 3 feet by 4 feet and displayed on a wall, then I haven't tried and would not be too sure.  Although I HAVE seen exhibitions displaying just that, i.e. large enlargements of photographs from iPhones - and they looked fine due to the mood and/or subject matter

- if it means a shot that can be printed at a normal size then yes, the iPhone works fine especially for shots in good light but not just.  The blue skies can look a little noisy of course.

- if it means sharing shots, via FB or by email or messages, with friends and family when I am mountaineering, then the iPhone is just perfect.  Not sure if the link below works:

https://www.facebook.com/media/set/?set=a.2667401181983.72280.1764685919&type=1&l=5e34d9a1ce