What cannot be uploaded to Imgur servers :
1. Images that are threatening , harassing , defamatory, or that encourage violence or crime. Any images that might be illegal in the US or EU.
2. Copyrighted images if you don't own the copyright and are not licensed to do so.
3. Violence , "hate speech" ( i.e . demeaning race , religious orientation , etc ) , or advocacy against any individual , group , or organization.