As someone who has never hosted an image service like this, what actions do you have to take to stop "bad" people from using your service? For example, uploading inappropriate / illegal / violent images.
I developed a website for the university I attend that anyone can upload photographs of older exams for each course. In order to solve the image content problem the system checks every uploaded image with a 3rd party image recognition API[1] before saving it. Works pretty good so far!