PUBLIC SERVICE ANNOUNCEMENT:
If you use AO3 to post fic, a site called Ebooks Tree had installed a bot to download fanfic and post it on their own site - a download site with paid advertising.
More information about Ebooks Tree, just what it is that they're doing, and why this is NOT OKAY can be found through links here.
AO3 has been made aware and updates can be found here. There are templates for demanding they take down your works here and here. Be sure and screenshot your message when you send it, just in case you need proof later.
So far we've found stories for myself, Arytra, PunkPinkPower, Starandrea, TheSecondBatGirl, tptigger, EstiRose, PockySquirrel, Rivulet027, Dahlia_Moon, gingayellow, Griddlebone, Lilyleia78, IndigoMay, Guardian of Hope, Sailorsol, Terrierlee, werepuppyblack, wildforce71, Angel-negra. I'm pretty sure the bots were going through bookmark lists. PLEASE go search your name, and anyone else you can think of! And spread the word: no one deserves to have their hard work used without their permission.
* Posting this on tumblr, too. If there's anyone else you find that you're not sure how to contact, please reply or add them to the list so we can make sure someone who does know their e-mail can tell them.