Can I edit someone's post and attribute the image or other foreign / cited content, if post's author refuses to do so?
An example. People say (in comments), that author should attribute the image, then that he must do this, then they even reverse-search the Internet for him to find the proper source, and he still refuses to edit the answer and add proper attribution.
I thought that, in this case, editing the answer and adding proper attribution is not only my privilege, but also my must. But, since many people found adding attribution needed and still refused to do the edit, that made me thinking, if I'm thinking correctly.
What should I do in case like this?