Your comments

You can't. It says "permanently hide this image". It totally removes it from your account.
This is an interesting idea. I'll see what I can do.
You can...not sure why it's not working for you.
A new mobile version will be coming soon that addresses this.
Great suggestion. I'll get this worked in.
Sorry, but this will not be happening anytime soon. We want to focus our efforts on becoming the best platform for images, and not neccesarily all types of media.
Inside your account, there's a "hide" button that appears when you select an image for deletion. This is why this button is there, so that you can hide those images from your account and make them anonymous. Thus, there's no need to actually sign out or upload as anonymous.