Well, whatever Pekka wants... Pekka gets! 
Personally, I found it easier to edit an interesting photo with Image Editing OK vs. requesting permission and not getting it because the owner of the photo checked in again 2 pages later. I used to edit roughly 10 photos a month, now I might do 1 photo every 10 months, going through the rigmarole of asking for permission, getting it and then editing. I think we are all poorer in the end...
My personal tale:
My first decent portrait of my wife was edited this way by another 60D photographer (a pro) and it became my goal to be achieved (since I am using different software). I believe it improved my portrait editing by a LOT!
Anyway, as I said, whatever Pekka wants... Pekka gets!