I have a hand-coded site. I just started working on a strategy that will allow users to integrate their images and drawings into the site. The problem is that I know users will start uploading images that they stole from around the internet. This is not acceptable and I don't want trouble with other webmasters. So, I need a high level strategy to deal with this problem.
Let them upload the image URLs. (The images won't be displayed initially.) then let a trusted moderator make a judgement. If it is open source from Wikimedia for example, chances are it can be used. If however the image is from another site, it could be an opportunity to contact the webmaster, offer to swap a link for a one-time use of their image (compliment them on site and do a little promotion/networking).
Tie the custom coded site into some image gallery if they have some 'legalese' policy already integrated into it.
Is there a third party image hosting service that permits some sort of hot linking? What are the SEO implications of this approach?
How can I let users upload images without getting myself in trouble? (Critique plan A, Finish Plan B or C, or create a new Plan D.)