On SU, there is a question from a new user, who links to an image that he is hosting on his site. The image seems to be quite relevant to the question.
When I see these sorts of situations, should I upload these images to imgur so that they don't get lost? Or would that be rude without the permission of the question asker? I guess I could leave a comment asking the OP if he would like me to upload it, perhaps also explaining that when you get 10 rep you can upload your own images.