just for fun.
it's just as useless to post my calibration settings for others to use, but those threads are very popular too.
the only time there's really any 'purpose' is if i'm taking pics of two displays at the same time, then i can use it to point out relative differences. otherwise, nobody is trying to show how good the display is, really. most displays can look phenomenal in pictures, and no picture will ever look better than your display. i think we all realize this, but if we start criticizing every thing we do in this hobby, half the threads in here will end up getting axed...
it's the basic rule of the internet, as long as it's not hurting anybody, if you don't like it, just move along. when somebody posts one pic of a f8500 and another of an oled or kuro and says 'see, here's proof that the f8500 has better blacks', then by all means, that's when you step in to prevent some poor noob from believing it. but as long as we're just posting screen shots, i don't see the harm.
PS, i spent the effort to learn how to use the camera, not to take better pics of my tv. my theory was that if i took a pic of a screenshot, and then compared the pic i took to the original, both displayed on the f8500, then it would exaggerate and point out the things i 'changed' when i took the photo. and i crushing blacks, am i adding a red tint, etc. i learned a lot about my camera from this exercise, which has helped me take better photos of my room, car, or whatever else i might like to take 'quality' photos of.