Just found out that all of my WordPress sites on one server have been hacked! I noticed that all of my sites took forever to load this evening and even crashed the browser a few times. I saw a bunch of requests to directagain.com, adnoble.com etc. Looked at the source and found a bunch of iframes loading up through ignorelist.com. I searched through the code and eventually found that the main index.php file had been changed to include the encoded hack: PHP: base64_decode('ZWNobyA...lots of characters etc... Looks like they were doing fake clicks or impressions on a bunch of ads. Glad I didn't buy any of those ads! I only found out because ignorelist.com was down for a bit tonight. I wonder how long this has been killing my rankings!!!