Webmaster Tools is there for you during the good times ("No errors detected in the last 90 days. Nice!” in Crawl Errors) and the bad ("Unfortunately, it appears that your site has been hacked." in Security Issues). However, many of the hacked sites we see on a daily basis are missing out on our hacked alerts because they’re not verified in Webmaster Tools.
If you haven’t already, verify your site(s) in Webmaster Tools and encourage your friends to do so as well at http://goo.gl/bicdC
. If you’re already verified, check the Security Issues section to see if you’ve received any alerts.
Share your hacking prevention tips with the hashtag #NoHacked