When you hover over a comment, an arrow will pop up on the right and you can select report. Thanks!

We do not block any IPs. Perhaps try changing your DNS to Google's Public DNS or Open DNS.

There is value in the downvote button in that it identifies bad content and affects reputation points. We do not plan to get rid of it altogether. There are measures in place to prevent excessive downvoting. 

No, we do not have the ability to know the contents of the image, only the URL. 

No, we do not have the ability to know the contents of the image, only the URL.