There was a post which I have moved to the dumpster about whether it was allowed to edit other peoples pictures. It started to get out of hand, so I moved it.
For this site, let's make it clear. Unless the poster gives explicit permission to do so, or the thread (e.g. a competition) starter post says it's OK to do so, then please do NOT edit other peoples images.
If you think something could be done better by some post processing, then ask permission first.
If this all goes against what has been mentioned before, then take this as an updated rule enhancement.
Alan