One last update on the Escher Girls thing: apparently Randy Queen has apologised to Ami via e-mail and has retracted all of his DMCA takedown requests from Tumblr. So this has ended in the best way possible: fairly and without any actual lawsuits being filed.

Ami also found an email from Tumblr that said they had removed her original post about the takedown requests in error. I'm guessing the "error" was caused via automated system, illustrating perfectly why the DMCA system is broken.